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Mithril

Rare upgrade currency, mainly from dens and spelunking. Mountain damage can also drop it through luck and Mithril-luck scaling.

Main useSpend it on higher-impact upgrades and late-game systems. It comes from the mithril drop meter, dens, artifacts, and transmutation-style effects.
Best follow-upHow to Get Mithril · Mithril Drops
PageAreaCostWhat It Does
Serrated Mithril SpikesBallistics WorkshopGold: 80
Mithril: 1
11 tiers
The harpoon bolts are now tipped with serrated spikes forged from mithril, greatly increasing their critical hit potential.
Devastating PayloadArtillery HallGold: 320
Mithril: 0
10 tiers
Duke Cannons get bonus damage.
Monster BaneBallistics WorkshopGold: 190
Mithril: 1
10 tiers
Mithril and silver coat the bolt. Monsters love that. Bonus damage to dens.
Thunderline NetworkSpelunker's GuildGold: 350
Mithril: 1
10 tiers
Less time to return based on the listed upgrade value.
Cookie CutterGrand LaboratoryGold: 300
Mithril: 1
9 tiers
Laser Cannon gains bonus damage over time, Gem luck, and a calamity damage multiplier.
Relic RaidingSpelunker's GuildGold: 200
Mithril: 1
9 tiers
Increases the chance that dens drop artifacts by the listed chance.
Rocket SalvoBallistics WorkshopGold: 100
Mithril: 1
9 tiers
Turrets have a chance while firing to launch an unguided rocket in the general direction of their target.
Deadeye CalibrationArtillery HallGold: 250
Mithril: 1
8 tiers
Duke Cannons get bonus crit chance.
PickarangMiner's GuildGold: 800
Mithril: 2
8 tiers
Alien technology from down under. Only a few dwarves can understand it.
Power OverwhelmingGrand LaboratoryGold: 600
Mithril: 2
7 tiers
It's over 9000! Laser Cannon gets bonus damage over time for each Scientist!
Quantum ScramblerGrand LaboratoryGold: 400
Mithril: 2
7 tiers
Laser Cannon deals bonus damage over time against dens. Each scientist adds a chance for mountain hits to erupt into a gem geyser.
Wrecking BallArtillery HallGold: 200
Mithril: 1
7 tiers
Duke Cannons deal bonus damage against dens. After impacting the mountain, falling cannonballs damage any dens they collide with for a listed share
Ancestral LoreSpelunker's GuildGold: 200
Mithril: 1
6 tiers
Increases the odds of spelunkers retrieving PP by the listed upgrade value.
Big Bad BombDemolition ShackGold: 200
Mithril: 1
6 tiers
Demodwarves have a big bomb chance to throw a heavy large metal bomb instead of a dynamite stick, with +50% damage, +8 force, +35% radius and -13%
SoundPreviewLength
Coin0.25s
Stone Clunk10.07s