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Mithril Drops

Mithril is both a resource and a probability system. Hits build random progress toward a drop rather than using a flat per-hit percentage.

Drop FormulaEach hit adds mithril progress based on damage dealt as a share of mountain max HP. The multiplier starts at 0.03, gains 0.06 per mithril-luck point, caps the luck term at 18, and each normal luck point adds 0.01 mithril luck. A mithril drop appears when progress beats a random threshold from 0.3 to 1.7.
Mean Base0.03
Mean Per Luck0.06
Luck Conversion0.01
Drop Step Range0.3-1.7
DenGuaranteedExtra MaxLoot RangeArtifact Chance
Ancient Vault125-816%
Dark Castle014-69%
Goblin Den014-68%
Mithril Vein121-41%
Troll Cave024-711%
UpgradeBuildingEffect / Use
Great Duke CannonArtillery HallA massive cannon that shoots elephant-sized cannonballs. The impact shakes the mountain like a small meteor.
Harpoon BallistaBallistics WorkshopBallista's purpose is to try and target dens and veins. Prioritizes lower health ones.
Monster BaneBallistics WorkshopMithril and silver coat the bolt. Monsters love that. Bonus damage to dens.
Serrated Mithril SpikesBallistics WorkshopThe harpoon bolts are now tipped with serrated spikes forged from mithril, greatly increasing their critical hit potential. Harpoons get bonus crit chance.
Stardust Calamity PowderDemolition ShackStars and mithril ground into gunpowder, long believed to bring luck in finding their brethren beneath the stone. Demodwarves get bonus Mithril luck, Gem luck, and damage.
DemodwarfDemolition ShackBOOM BABY! Dynamite throwing can be dangerously unpredictable and may entirely miss the Mountain, and hopefully your Runners too.
Shrapnel Rocks HateDemolition ShackGunpowder is now riddled with little mithril spikes that upon explosion dig further into the surrounding rock, possibly hitting the weakest and tenderest of spots.
FlamerFlameworksFIRE AND FURY! Flamers and their soot-stained beards, are clad in heat resistant plating.
Mithril To BloodRitual / specialCreates 1-3 dwarves.
Mithril To SpiritRitual / specialCreates 1 soul.
Soul To Bearded EarthRitual / specialCreates 1-5 dwarves and 1-7 mithril.
The Great ForgeKhazad GreatholdAh, my cold moldable friend, let me bathe you in fire, for you may be but a humble ingot, yet you will grow into wonders which will endure long after I am gone.
AlchemyGrand LaboratoryThe ultimate purpose of alchemy is finding the Philosopher's Stone, which is required to access The Great World Spire. Every 20 uses the mithril cost is increased by 1.
Laser CannonGrand LaboratoryTakes a long time to charge-up, then deals rapid damage every 0.5 seconds for 5 to 8 seconds.
BulldozerManufactorumA treaded metal machine, shaped like a bull and powered by steam and fire. The metal beast can carry a vast amount of ore before it needs returning, and is heavily protected from
Reinforced HullManufactorumAdditional mithril plating and structural reinforcements make the bulldozer more resilient to the falling sky. Bulldozer gets bonus HP.
MinerMiner's GuildStats tracked: Attack Cooldown, Damage, Calamity Multiplier, Den Damage Multiplier, Crit, Crit Multiplier, Luck, Gem Luck, Mithril Luck, Pickarang, Thunderboom.
Mithril PickaxesMiner's GuildAhh, how effortlessly mithril breaks rock, as if it was trained for it since creation! Pickaxes get bonus damage.
Thunderboom TipsMiner's GuildRunesmiths charge the pickaxe with booming thunder, furiously reverberating inside its mithril prison.
Sacrifice BeardsRitual / specialCreates 1-4 mithril and 3-6 faith.
SanctificationRitual / specialCreates 1 Priest. Scales the gold cost normally. Each use increases the ritual cost by +2 Mithril and +5 Faith.
Mithril DiviningSpelunker's GuildThrough star-etched crystals and ancient runes, dwarven seers divine the whispers of mithril veins. Increases Mithril luck of all dwarves by spelunker mithril luck.
SpelunkerSpelunker's GuildEach spelunker returns after the listed return time with one weighted outcome: gold scaled by mountain level and mapping, 1-3 mithril, mithril plus 1-3 revealed mithril veins
Treasure HunterSpelunker's GuildEach treasure hunter returns after the listed return time with one weighted outcome: a random artifact, a unique Tier 5 artifact, 2-4 mithril, 1-3 PP, 1 soul, a trap calamity, an
Enchant Primal PowerRitual / specialAfter casting this ritual select a dwarf or their building. All existing and future dwarves of that type will permanently get +5% damage.
Mithril ForgingThe Great ForgeMithril whispers primordial secrets to its molder. To forge it is to dance with ancient starlight itself. Tier 1 unlocks Mithril Pickaxes and Pickarang for miners.
RunesmithThe Great ForgeWith a chant and a crescendo of rhythmic pounds, the Runesmith prepares his anvil to sing true, before the final strike forges magic into a rune, instilling power to steel and
Mithril ChainmailThe Great MawThick layers of leather and mithril mesh clad the dwarf, hopefully providing some protection against monsters, stray explosives and falling rocks.