Expeditions

Overview

EXPEDITIONS send crews of your pets down a mine on the server's clock. When the trip is over they come home with ore — the very same ores the board's bins pay — which you turn into bars on the CRAFTING page. It is the way to earn ore while you are away: nothing happens faster by watching, and a longer trip pays a little more per hour, so setting off overnight is the efficient choice.

A full trip can also turn up a deep find (a pocket of the next world's ore), a mining pet item, a Strange Slab for the Boneyard, or — rarest of all — a fossil. See Fossils and Fossil Pets for what the Boneyard does with those.

How to unlock

The EXPEDITIONS tile appears on the MENU once you have broken 5 gates in the Hoard. Your first mine, The Old Workings, is free. Every other mine is a mineshaft you buy with bars, in order — and a later world's shafts need both that world unlocked on the board and a gate of their own:

The Armory (gate 1) holds the permanent rows that add carts and crew seats, and the Research Hall (gate 20) builds statues out of the bars your crews bring home.

How a trip works

1. Open MINES, pick a world, and tap an empty cart.
2. SEND A CREW: choose the mine, the trip length and the pets. The sheet previews the ore you should expect and your odds of a pet item.
3. The crew is away until the timer ends. Its power and every bonus are fixed when it leaves — levelling a pet or buying an upgrade afterwards does not change a crew that is already underground.
4. When it is back, tap the cart to collect: the haul is revealed card by card and the ore lands in your ore bank.
5. You can RECALL a crew early. A recalled crew keeps only the share of the ore it had time to dig, and can never bring a deep find, a pet item, a slab or a fossil — only a finished trip rolls those.

The mines

Each world has 3 mines and each mine digs two of that world's ores: the shallow mine digs the two commonest, the middle mine the next two, the deep mine the two rarest. The deeper the mine, the slower it digs — its ores are worth more everywhere they are spent. Ore / hour below is per point of crew power, before any upgrade. Every world is counted on the same scale — a later world's ore is not quoted in bigger digits, its mines simply dig slower and its prices climb higher.

A mineshaft is bought once and stays open. A world's middle and deep shafts are paid in the two bars of the mine before them, so you work each mine for a while before the next one opens. A world's first mine is paid in its own world's grey and bronze bin bars, and World 1's first mine is free. The prices are in the table.

The 15 mines, in the order they are bought

	Mine	World	Ores (share of a haul)	Ore / hour / power	Mineshaft price
	The Old Workings Timber props, tin seams and green copper. Every crew starts digging here.	World 1	Tin 65% Copper 35%	14.4	Free
	Leadstone Drift A long grey drift where silver threads the rock and gold hides behind it.	World 1	Silver 65% Gold 35%	10.08	110K Tin Bar 61K Copper Bar after The Old Workings
	Silverdeep Far below the workings, verdite glows green and crimsonite burns red in the dark.	World 1	Verdite 65% Crimsonite 35%	6.48	1.2M Silver Bar 670K Gold Bar after Leadstone Drift
	Frostvein Deep Ice-locked galleries where frostite sleeps under the rime, beside seams of rimebronze.	World 2	Frostite 65% Rimebronze 35%	10.8	940 Frostite Bar 1.1K Rimebronze Bar after Silverdeep
	Glacite Caverns Caverns of blue ice, veined with snowsilver and stargold.	World 2	Snowsilver 65% Stargold 35%	7.56	160K Frostite Bar 85K Rimebronze Bar after Frostvein Deep
	Aurora Rift The aurora bleeds into the rock here: auroranium, and hollysteel that glows like stars.	World 2	Auroranium 65% Hollysteel 35%	4.86	3.2M Snowsilver Bar 1.7M Stargold Bar after Glacite Caverns
	Bloomroot Hollow Roots split the stone here. Stonebark and oakbronze grow in the cracks.	World 3	Stonebark 65% Oakbronze 35%	7.8	750 Stonebark Bar 1K Oakbronze Bar after Aurora Rift
	Amber Grotto A warm grotto where bloomsilver flowers on the walls and leafgold drips like sap.	World 3	Bloomsilver 65% Leafgold 35%	5.46	190K Stonebark Bar 100K Oakbronze Bar after Bloomroot Hollow
	Golden Burrow A deep burrow lined with sylvanite, and rosesteel at its heart.	World 3	Sylvanite 65% Rosesteel 35%	3.51	18M Bloomsilver Bar 9.5M Leafgold Bar after Amber Grotto
	The Sunken Shaft Flooded tunnels crusted with brinium and tidebronze.	World 4	Brinium 65% Tidebronze 35%	5.4	1K Brinium Bar 1K Tidebronze Bar after Golden Burrow
	Coral Gallery Coral grows over the seams, and pearlsilver and sunkgold hide in the rock.	World 4	Pearlsilver 65% Sunkgold 35%	3.78	420K Brinium Bar 230K Tidebronze Bar after The Sunken Shaft
	The Abyss Something large lives down here. Kelpsteel and coralsteel glow where it has passed.	World 4	Kelpsteel 65% Coralsteel 35%	2.43	45M Pearlsilver Bar 24M Sunkgold Bar after Coral Gallery
	Cinderheart Magma runs in the veins and ash falls like snow over ashiron and cinderbrass.	World 5	Ashiron 65% Cinderbrass 35%	3.6	1.7K Ashiron Bar 740 Cinderbrass Bar after The Abyss
	Emberway A tunnel of red embers that never cool, streaked with smokesilver and pyrogold.	World 5	Smokesilver 65% Pyrogold 35%	2.52	370K Ashiron Bar 200K Cinderbrass Bar after Cinderheart
	Pyre Core The mountain's burning heart: venomite and embersteel. Only the toughest crews come back.	World 5	Venomite 65% Embersteel 35%	1.62	98M Smokesilver Bar 53M Pyrogold Bar after Emberway

A haul is split between the mine's two ores by the shares above, with a little random noise on each. Upgrades that raise Rare Ore tilt the split toward the second, rarer ore.

Trip lengths and rare finds

Four trip lengths. The hourly bonus multiplies the ore a trip digs per hour, and the shorter the trip the bigger it is: back-to-back 30 MIN trips dig ×1.24 the ore of one 24 HR trip over the same 24 hours, so coming back often pays best and a long trip is the one that keeps digging while you are away. The rare finds are all rolled per hour underground — 2.5% for a deep find, 1 in 1,000 (World 1) up to 1 in 450 (World 5) for a pet item, 1.2% for a Strange Slab, 0.6% for a fossil — so every hour a crew is down counts the same, whatever the length. Base odds, before any upgrade, item or fossil pet:

Trip Speed makes a crew walk home sooner without shrinking the haul: +100% Trip Speed is the same trip in half the time. The long-trip rows of the world shops (Night Shift, Polar Night, Long Summer, Deep Current, Endless Night) only count on trips of 8 hours or longer — that is judged on the trip you picked, not on how fast the crew walked it.

The crew

Only regular and limited pets go underground — elusive pets do not. A crew may hold only one of each species, and a pet that is busy anywhere else (the board, the Hoard, a Ball Factory machine) cannot be sent: see One pet, one job.

More carts and bigger crews

You start with 3 carts of up to 2 pets. Extra carts and seats are bought with bars:

Row	Where	Gives (at max)	Unlocks at	Price
Fourth Cart	The Armory	+1 Carts	World 1 GATE 10	651K Tin Bar 527K Silver Bar 403K Verdite Bar
Wider Harness	The Armory	+1 Crew Size	World 2 GATE 20	1.76M Frostite Bar 1.43M Snowsilver Bar 1.06M Auroranium Bar
Fifth Cart	The Armory	+1 Carts	World 2 GATE 21	946K Rimebronze Bar 759K Stargold Bar 572K Hollysteel Bar
Deep Harness	The Armory	+1 Crew Size	World 4 GATE 37	24.3M Brinium Bar 19.5M Pearlsilver Bar 14.7M Kelpsteel Bar
Bunkhouse	World 1 UPGRADES tab	+1 Crew a Party	World 1 GATE 9	342K Gold Bar 205K Verdite Bar

Locked seats show as padlocks on the SEND A CREW sheet; tapping one jumps to the row that opens it.

Deep finds

A deep find is a full trip breaking through into the next world's first ore — a taste of the next mine before you own it. The chance is 2.5% per hour underground (the table above), raised by Deep Find upgrades and items — with no cap: past 100% every whole 100% is a guaranteed find and the rest is a chance at one more, so a boosted 24 HR trip can bring home several. Its size grows with crew power and with everything that raises your ore yield, and the Deep Find Size rows multiply it again. The last world has no next world, so its crews find a large pocket of their own mine's rarest ore instead.

The strike chain

Each world's UPGRADES tab sells a strike chain. A finished trip first rolls LUCKY STRIKE: if it hits, the whole haul is multiplied by ×10 (more with STRIKE FORCE). A strike then rolls SUPER STRIKE for ×10 again, and a super rolls ULTRA STRIKE for ×10 once more. Only trips that come home whole can strike — never a recalled crew.

Pet items from the deep

Only a finished trip can find a pet item, and the deeper the world the likelier it is: each hour underground is a 1 in 1,000 (W1), 1 in 800 (W2), 1 in 600 (W3), 1 in 500 (W4), 1 in 450 (W5) chance. A 24 HR trip is about 2.4% (1 in 41.7) in World 1 and 5.33% (1 in 18.8) in World 5; a 30 MIN one almost never. Every world finds the same tools, evenly.

What a found item can be

World	Item table (share of a find)
World 1	Prospector's Pan 25%   Miner's Headlamp 25%   Dowsing Rod 25%   Paleontologist's Brush 25%
World 2	Prospector's Pan 25%   Miner's Headlamp 25%   Dowsing Rod 25%   Paleontologist's Brush 25%
World 3	Prospector's Pan 25%   Miner's Headlamp 25%   Dowsing Rod 25%   Paleontologist's Brush 25%
World 4	Prospector's Pan 25%   Miner's Headlamp 25%   Dowsing Rod 25%   Paleontologist's Brush 25%
World 5	Prospector's Pan 25%   Miner's Headlamp 25%   Dowsing Rod 25%   Paleontologist's Brush 25%

These are ordinary pet items: a pet wears them like any other, and they work while that pet is on an expedition (Prospector's Pan also pays on the board's bin landings). Dig Power items raise the wearer's own power; the crew-wide ones (deep finds, rare ore, item finds, slab finds) are summed over the whole crew when it leaves.

Expedition pet items

	Item	Rarity	Effect	Drops in
	Prospector's Pan	BASIC	+5% Ore (bin landings + expedition crew)	World 1 World 2 World 3 World 4 World 5
	Miner's Headlamp	BASIC	+10% Dig Power (expeditions)	World 1 World 2 World 3 World 4 World 5
	Dowsing Rod	RARE	+10% Deep Find Chance (crew)	World 1 World 2 World 3 World 4 World 5
	Paleontologist's Brush	RARE	+50% Strange Slab Finds (crew)	World 1 World 2 World 3 World 4 World 5

World upgrades

The UPGRADES tab is a shop for each world, paid in that world's bars. Almost every row boosts only its own world's mines. Rows open one by one as you break gates, and each level costs more than the last (the growth column). A row that costs two bars charges the second at 60% of the first.

• DIG MORE STONE is the one ore row: +1× ore a level (×2, ×3, ×4 …) and every 25 levels a milestone multiplies the lot by ×2. Its price walks through the world's bars, 25 levels a bar. The rest of the group is the strike chain, trip speed, deep finds, rare ore, and the long-trip bonus.
• VETERAN CREWS pays more ore for every 10 trips that world's mines have completed (counted up to 1,000 trips); RICH COMPANY pays more for every level you own in that world's shop.
• SIEGE rows do nothing underground — they arm the Hoard against its gates: accuracy, armour pierce, gate damage and longer attempts.
• CREW rows are about who goes down and what they find: crew seats, an extra cart, fossil, slab and pet item finds, heavier deep finds. These apply to every world.
• META rows make the shop itself cheaper, or raise MORE STONE's level cap.

World 1 upgrades

11 rows, paid in World 1 bars

	Upgrade	Group	Per level	Levels	At max	Opens at	Level 1 price	Growth
	More Stone Every crew digs another load. +1x ore a level, and every 25 levels doubles it all.	DIG	+1x Ore · x2 every 25	50	x204 Ore	GATE 5	2.22K Tin Bar then the next bar every 25 levels	×1.31
	Lucky Strike Now and then a crew hits a seam that pays ten times over.	DIG	+1% · a strike pays x10+	15	15% Strike Chance	GATE 5	4.08K Copper Bar	×1.72
	Pit Ponies Ponies pull the carts. Crews come home sooner.	DIG	+2% Trip Speed	10	+20% Trip Speed	GATE 6	178K Tin Bar 107K Silver Bar	×1.8
	Strike Force A lucky strike pays even more.	DIG	+1x Strike	10	x20 Strike	GATE 7	96K Copper Bar 57.6K Gold Bar	×1.8
	Candle Maps Maps of the cracks. Deep finds come more often.	DIG	+3% Deep Finds	10	+30% Deep Finds	GATE 8	66.6K Gold Bar	×1.8
	Stone Sorters The rarer ore of every mine comes up more.	DIG	+5% Rare Ore	10	+50% Rare Ore	GATE 9	79.2K Verdite Bar	×1.8
	Bunkhouse Another pair of hands goes down with every party.	CREW	+1 Crew a Party	1	+1 Crew a Party	GATE 9	342K Gold Bar 205K Verdite Bar	×3.24
	Siege Sights Iron sights for the hoard. More accuracy against gates.	SIEGE	+5 Gate Accuracy	10	+50 Gate Accuracy	GATE 12	66K Gold Bar 39.6K Crimsonite Bar	×1.8
	Winch Gear A deep find comes up heavier.	CREW	+10% Deep Find Haul	10	+100% Deep Find Haul	GATE 12	79.2K Verdite Bar	×1.8
	Miners' Guild The guild haggles for you. This world's upgrades cost less.	META	-3% Prices	5	-14.1% Prices	GATE 13	552K Crimsonite Bar	×2.6
	Night Shift Crews that stay down 8 hours or more bring back far more.	DIG	+10% Ore, 8 HR+ Trips	10	+100% Ore, 8 HR+ Trips	GATE 14	342K Verdite Bar 205K Crimsonite Bar	×1.8

World 2 upgrades

13 rows, paid in World 2 bars

	Upgrade	Group	Per level	Levels	At max	Opens at	Level 1 price	Growth
	More Stone Every crew digs another load. +1x ore a level, and every 25 levels doubles it all.	DIG	+1x Ore · x2 every 25	75	x608 Ore	GATE 16	2.16K Frostite Bar then the next bar every 25 levels	×1.23
	Lucky Strike A crew hits a frozen seam that pays ten times over.	DIG	+1% · a strike pays x10+	20	20% Strike Chance	GATE 16	4.32K Rimebronze Bar	×1.64
	Strike Force A lucky strike pays even more.	DIG	+2x Strike	10	x30 Strike	GATE 16	248K Rimebronze Bar 149K Snowsilver Bar	×1.8
	Ice Sleds Sleds over the ice. Crews come home sooner.	DIG	+2% Trip Speed	10	+20% Trip Speed	GATE 16	297K Frostite Bar 178K Stargold Bar	×1.8
	Super Strike A strike sometimes cracks open a super strike: ten times again.	DIG	+1% · x10 a strike	20	20% Super Strike	GATE 17	85.5K Stargold Bar	×1.72
	Starlight Charts Charts drawn by starlight. Deep finds come more often.	DIG	+3% Deep Finds	10	+30% Deep Finds	GATE 18	176K Stargold Bar	×1.8
	Frost Sights Frostiron sights for the hoard. More accuracy against gates.	SIEGE	+10 Gate Accuracy	10	+100 Gate Accuracy	GATE 18	207K Auroranium Bar	×1.8
	Slab Splitters Crews come back with more of the big slabs.	CREW	+3% Slab Finds	10	+30% Slab Finds	GATE 18	176K Stargold Bar 105K Auroranium Bar	×1.8
	Icebreaker Rams Rams tipped in rime. The hoard ignores more gate armor.	SIEGE	+10 Gate Pierce	10	+100 Gate Pierce	GATE 19	113K Hollysteel Bar	×1.8
	Frost Sieves The rarer ore of every mine comes up more.	DIG	+5% Rare Ore	10	+50% Rare Ore	GATE 20	248K Rimebronze Bar 149K Auroranium Bar	×1.8
	War Drums The hoard charges the gate to a drum. Gate damage compounds.	SIEGE	x1.05 Gate Damage	10	x1.63 Gate Damage	GATE 21	173K Stargold Bar 104K Hollysteel Bar	×1.8
	Sled Traders Traders on the ice haggle for you. This world's upgrades cost less.	META	-3% Prices	5	-14.1% Prices	GATE 21	293K Hollysteel Bar	×2.6
	Polar Night Crews that stay down 8 hours or more bring back far more.	DIG	+10% Ore, 8 HR+ Trips	10	+100% Ore, 8 HR+ Trips	GATE 21	189K Auroranium Bar 113K Hollysteel Bar	×1.8

World 3 upgrades

15 rows, paid in World 3 bars

	Upgrade	Group	Per level	Levels	At max	Opens at	Level 1 price	Growth
	More Stone Every crew digs another load. +1x ore a level, and every 25 levels doubles it all.	DIG	+1x Ore · x2 every 25	100	x1616 Ore	GATE 22	1.82K Stonebark Bar then the next bar every 25 levels	×1.2
	Lucky Strike A crew hits a root-choked seam that pays ten times over.	DIG	+1% · a strike pays x10+	25	25% Strike Chance	GATE 22	4.2K Oakbronze Bar	×1.56
	Strike Force A lucky strike pays even more.	DIG	+3x Strike	10	x40 Strike	GATE 22	1.34M Oakbronze Bar 806K Bloomsilver Bar	×1.8
	Super Strike A strike sometimes cracks open a super strike: ten times again.	DIG	+1% · x10 a strike	20	20% Super Strike	GATE 23	476K Leafgold Bar	×1.72
	Root Runners Root tunnels as shortcuts. Crews come home sooner.	DIG	+2% Trip Speed	10	+20% Trip Speed	GATE 23	1.6M Stonebark Bar 958K Leafgold Bar	×1.8
	Veteran Crews +1% ore a level for every 10 trips this world's mines have seen.	DIG	+1% Ore / 10 Trips	10	+10% Ore / 10 Trips	GATE 24	1.09M Sylvanite Bar	×1.8
	Thorn Sights Thornwood sights for the hoard. More accuracy against gates.	SIEGE	+20 Gate Accuracy	10	+200 Gate Accuracy	GATE 26	980K Leafgold Bar	×1.8
	Root Rams Rams of living root. The hoard ignores more gate armor.	SIEGE	+20 Gate Pierce	10	+200 Gate Pierce	GATE 27	613K Rosesteel Bar	×1.8
	Grove Charts Deep finds come more often.	DIG	+3% Deep Finds	10	+30% Deep Finds	GATE 27	1.34M Oakbronze Bar 806K Leafgold Bar	×1.8
	Siege Towers Towers let the hoard stay on the wall. Gate attempts last longer.	SIEGE	+1s Gate Attempts	10	+10s Gate Attempts	GATE 28	1.02M Sylvanite Bar 612K Rosesteel Bar	×1.8
	Petal Sieves The rarer ore of every mine comes up more.	DIG	+5% Rare Ore	10	+50% Rare Ore	GATE 28	1.76M Bloomsilver Bar 1.06M Sylvanite Bar	×1.8
	Bone Picks Crews turn up far more fossils in the seams.	CREW	+3% Fossil Finds	10	+30% Fossil Finds	GATE 28	924K Leafgold Bar 554K Rosesteel Bar	×1.8
	Bloom Drums Gate damage compounds.	SIEGE	x1.1 Gate Damage	10	x2.59 Gate Damage	GATE 29	952K Leafgold Bar 571K Rosesteel Bar	×1.8
	Grove Market This world's upgrades cost less.	META	-3% Prices	5	-14.1% Prices	GATE 29	1.64M Rosesteel Bar	×2.6
	Long Summer Crews that stay down 8 hours or more bring back far more.	DIG	+10% Ore, 8 HR+ Trips	10	+100% Ore, 8 HR+ Trips	GATE 29	1.01M Sylvanite Bar 605K Rosesteel Bar	×1.8

World 4 upgrades

18 rows, paid in World 4 bars

	Upgrade	Group	Per level	Levels	At max	Opens at	Level 1 price	Growth
	More Stone Every crew digs another load. +1x ore a level, and every 25 levels doubles it all.	DIG	+1x Ore · x2 every 25	125	x4032 Ore	GATE 30	3.3K Brinium Bar then the next bar every 25 levels	×1.15
	Lucky Strike A crew hits a drowned seam that pays ten times over.	DIG	+1% · a strike pays x10+	25	25% Strike Chance	GATE 30	9.24K Tidebronze Bar	×1.35
	Strike Force A lucky strike pays even more.	DIG	+4x Strike	10	x50 Strike	GATE 30	3.5M Tidebronze Bar 2.1M Pearlsilver Bar	×1.5
	Super Strike A strike sometimes cracks open a super strike: ten times again.	DIG	+1% · x10 a strike	25	25% Super Strike	GATE 31	968K Sunkgold Bar	×1.4
	Tide Carts Carts ride the tide out. Crews come home sooner.	DIG	+2% Trip Speed	10	+20% Trip Speed	GATE 31	4.03M Brinium Bar 2.42M Sunkgold Bar	×1.5
	Ultra Strike A super strike sometimes breaks into an ULTRA: ten times again.	DIG	+1% · x10 a super	15	15% Ultra Strike	GATE 32	1.94M Kelpsteel Bar	×1.5
	Veteran Crews +1% ore a level for every 10 trips this world's mines have seen.	DIG	+1% Ore / 10 Trips	10	+10% Ore / 10 Trips	GATE 33	2.9M Kelpsteel Bar	×1.5
	Rich Company +0.1% ore a level for every level bought in this world's shop.	DIG	+0.1% Ore / Shop Level	10	+1% Ore / Shop Level	GATE 33	2.46M Sunkgold Bar 1.48M Coralsteel Bar	×1.55
	Pearl Sights More accuracy against gates.	SIEGE	+40 Gate Accuracy	10	+400 Gate Accuracy	GATE 35	2.42M Sunkgold Bar	×1.5
	Coral Rams The hoard ignores more gate armor.	SIEGE	+40 Gate Pierce	10	+400 Gate Pierce	GATE 35	1.58M Coralsteel Bar	×1.5
	Deeper Caps MORE STONE can climb 25 levels further.	META	+25 MORE STONE Levels	3	+75 MORE STONE Levels	GATE 36	4.4M Coralsteel Bar	×12
	Trench Charts Deep finds come more often.	DIG	+3% Deep Finds	10	+30% Deep Finds	GATE 36	3.5M Tidebronze Bar 2.1M Sunkgold Bar	×1.5
	Diving Towers Gate attempts last longer.	SIEGE	+1s Gate Attempts	10	+10s Gate Attempts	GATE 36	2.64M Kelpsteel Bar 1.58M Coralsteel Bar	×1.5
	Trinket Eyes A crew is far likelier to come home with a pet item.	CREW	+2% Pet Item Finds	10	+20% Pet Item Finds	GATE 36	2.64M Kelpsteel Bar 1.58M Coralsteel Bar	×1.55
	Pearl Sieves The rarer ore of every mine comes up more.	DIG	+5% Rare Ore	10	+50% Rare Ore	GATE 37	4.49M Pearlsilver Bar 2.69M Kelpsteel Bar	×1.5
	Kraken Drums Gate damage compounds.	SIEGE	x1.2 Gate Damage	10	x6.19 Gate Damage	GATE 37	2.46M Sunkgold Bar 1.48M Coralsteel Bar	×1.5
	Tide Market This world's upgrades cost less.	META	-3% Prices	5	-14.1% Prices	GATE 37	4.24M Coralsteel Bar	×2
	Deep Current Crews that stay down 8 hours or more bring back far more.	DIG	+10% Ore, 8 HR+ Trips	10	+100% Ore, 8 HR+ Trips	GATE 37	2.64M Kelpsteel Bar 1.58M Coralsteel Bar	×1.5

World 5 upgrades

19 rows, paid in World 5 bars

	Upgrade	Group	Per level	Levels	At max	Opens at	Level 1 price	Growth
	More Stone Every crew digs another load. +1x ore a level, and every 25 levels doubles it all.	DIG	+1x Ore · x2 every 25	150	x9664 Ore	GATE 38	2.49K Ashiron Bar then the next bar every 25 levels	×1.14
	Lucky Strike A crew hits a molten seam that pays ten times over.	DIG	+1% · a strike pays x10+	25	25% Strike Chance	GATE 38	7.7K Cinderbrass Bar	×1.35
	Strike Force A lucky strike pays even more.	DIG	+5x Strike	10	x60 Strike	GATE 38	7.56M Cinderbrass Bar 4.54M Smokesilver Bar	×1.5
	Super Strike A strike sometimes cracks open a super strike: ten times again.	DIG	+1% · x10 a strike	25	25% Super Strike	GATE 39	2.1M Pyrogold Bar	×1.4
	Lava Rails Carts ride the lava rails. Crews come home sooner.	DIG	+2% Trip Speed	10	+20% Trip Speed	GATE 39	8.82M Ashiron Bar 5.29M Pyrogold Bar	×1.5
	Ultra Strike A super strike sometimes breaks into an ULTRA: ten times again.	DIG	+1% · x10 a super	20	20% Ultra Strike	GATE 40	3.08M Venomite Bar	×1.45
	Veteran Crews +1% ore a level for every 10 trips this world's mines have seen.	DIG	+1% Ore / 10 Trips	10	+10% Ore / 10 Trips	GATE 41	6.3M Venomite Bar	×1.5
	Rich Company +0.1% ore a level for every level bought in this world's shop.	DIG	+0.1% Ore / Shop Level	10	+1% Ore / Shop Level	GATE 41	5.32M Pyrogold Bar 3.19M Embersteel Bar	×1.55
	Ember Sights More accuracy against gates.	SIEGE	+80 Gate Accuracy	10	+800 Gate Accuracy	GATE 43	5.25M Pyrogold Bar	×1.5
	Magma Rams The hoard ignores more gate armor.	SIEGE	+80 Gate Pierce	10	+800 Gate Pierce	GATE 44	3.36M Embersteel Bar	×1.5
	Deeper Caps MORE STONE can climb 25 levels further.	META	+25 MORE STONE Levels	3	+75 MORE STONE Levels	GATE 44	11.9M Embersteel Bar	×12
	Ember Charts Deep finds come more often.	DIG	+3% Deep Finds	10	+30% Deep Finds	GATE 45	7.56M Cinderbrass Bar 4.54M Pyrogold Bar	×1.5
	Fire Towers Gate attempts last longer.	SIEGE	+1s Gate Attempts	10	+10s Gate Attempts	GATE 45	5.6M Venomite Bar 3.36M Embersteel Bar	×1.5
	Ash Sieves The rarer ore of every mine comes up more.	DIG	+5% Rare Ore	10	+50% Rare Ore	GATE 46	9.77M Smokesilver Bar 5.86M Venomite Bar	×1.5
	Fire Crews Fire-hardened crews bring every deep find up heavier.	CREW	+10% Deep Find Haul	10	+100% Deep Find Haul	GATE 46	5.67M Venomite Bar 3.4M Embersteel Bar	×1.5
	Molten Drums Gate damage compounds.	SIEGE	x1.4 Gate Damage	10	x28.93 Gate Damage	GATE 48	5.32M Pyrogold Bar 3.19M Embersteel Bar	×1.5
	Night Shift The night shift sifts the day's spoil: more fossils turn up.	CREW	+3% Fossil Finds	10	+30% Fossil Finds	GATE 48	5.67M Venomite Bar 3.4M Embersteel Bar	×1.8
	Ember Market This world's upgrades cost less.	META	-3% Prices	5	-14.1% Prices	GATE 49	9.1M Embersteel Bar	×2
	Endless Night Crews that stay down 8 hours or more bring back far more.	DIG	+10% Ore, 8 HR+ Trips	10	+100% Ore, 8 HR+ Trips	GATE 49	5.67M Venomite Bar 3.4M Embersteel Bar	×1.5

Armory rows that help expeditions

The Armory is a separate menu (it opens at gate 1, before expeditions do), but a block of its rows works underground. They are account-wide — they help every world's mines at once.

The Armory — expedition rows

Row	Per level	Levels	At max	Needs	Level 1 price
Lamp Oil A crew that can see walks home sooner.	+2% Trip Speed	10	+20% Trip Speed	World 1 GATE 6	74.8K Copper Bar 59.4K Gold Bar 44K Crimsonite Bar
Fourth Cart Another cart on the rails: four crews underground at once.	+1 Carts	1	+1 Carts	World 1 GATE 10	651K Tin Bar 527K Silver Bar 403K Verdite Bar
Frost Lanterns Cold light shows the cracks that lead further down.	+3% Deep Find Chance	15	+45% Deep Find Chance	World 2 GATE 16	238K Frostite Bar 182K Snowsilver Bar 140K Auroranium Bar
Survey Ledger Every odd rock written down. Crews find more Strange Slabs.	+10% Strange Slab Finds	10	+100% Strange Slab Finds	World 2 GATE 20	188K Rimebronze Bar 150K Stargold Bar 113K Hollysteel Bar
Wider Harness Room in the cart for one more pet.	+1 Crew Size	1	+1 Crew Size	World 2 GATE 20	1.76M Frostite Bar 1.43M Snowsilver Bar 1.06M Auroranium Bar
Fifth Cart Ice runners on the rails: five crews underground at once.	+1 Carts	1	+1 Carts	World 2 GATE 21	946K Rimebronze Bar 759K Stargold Bar 572K Hollysteel Bar
Root Maps Follow the roots. They always grow toward the good rough stone.	+4% Rare Ore Share	15	+60% Rare Ore Share	World 3 GATE 22	675K Oakbronze Bar 525K Leafgold Bar 400K Rosesteel Bar
Rootwood Spur A rootwood spur to richer seams: every crew brings home more ore.	x1.2 Crew Ore Yield	1	x1.2 Crew Ore Yield	World 3 GATE 28	5M Oakbronze Bar 4M Leafgold Bar 3M Rosesteel Bar
Diving Bells Air for the flooded shafts. Crews come up sooner.	+2% Trip Speed	10	+20% Trip Speed	World 4 GATE 30	5.04M Brinium Bar 3.99M Pearlsilver Bar 2.94M Kelpsteel Bar
Abyss Nets When a crew finds the deep seam, it hauls far more of it.	x1.08 Deep Find Size	30	x10.06 Deep Find Size	World 4 GATE 31	884K Tidebronze Bar 680K Sunkgold Bar 524K Coralsteel Bar
Diving Rails Rails laid under the flood to richer seams: every crew brings home more ore.	x1.2 Crew Ore Yield	1	x1.2 Crew Ore Yield	World 4 GATE 36	13.2M Tidebronze Bar 10.5M Sunkgold Bar 7.8M Coralsteel Bar
Deep Harness One more seat in every cart.	+1 Crew Size	1	+1 Crew Size	World 4 GATE 37	24.3M Brinium Bar 19.5M Pearlsilver Bar 14.7M Kelpsteel Bar
Everburning Lamps Lamps that never go out, down where nothing else lights.	+7% Deep Find Chance	15	+105% Deep Find Chance	World 5 GATE 46	3.83M Cinderbrass Bar 3.08M Pyrogold Bar 2.27M Embersteel Bar
Mountain Rails The last rails the mountain allows run to its richest seams: every crew brings home more ore.	x1.2 Crew Ore Yield	1	x1.2 Crew Ore Yield	World 5 GATE 48	27.9M Cinderbrass Bar 22.1M Pyrogold Bar 16.8M Embersteel Bar

Tips

• Keep every cart out. An idle cart is the only real waste in this mode.
• Send short trips while you play — the hourly bonus is biggest on 30 MIN trips — and long ones when you are going to be away: only trips of 8 hours or longer get the long-trip upgrade rows.
• Fill every seat — each extra pet counts a little less (90% of the one before) but always adds. Lead each cart with a strong pet rather than stacking all of them in one crew.
• Look for pets whose nature raises MINING, and keep natures that lower it on the board or in the Hoard instead.
• Buy MORE STONE first in every world; it multiplies everything else.
• Bins and mines pay the same ore. Mine the ores you are short of for the bar you are saving toward.