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Dark Castle

9% artifact chance; loot 4-6 items; 0 guaranteed mithril; up to 1 extra.

Rewards

Main use	Destroy it for 4-6 loot items and a 9% artifact chance.
Mithril	0 guaranteed; up to 1 extra.
Best loot weights	White Pearl (10x), Pink Diamond (10x), Mithril (1.4x), Large Gold Ore (1.2x), Diamond (1x), Ruby (1x)
Hazards	Uses bone hazards for contact and attacks.

Practical Details

Topic	Details
Use	Destroy it for 4-6 loot items, 9% artifact chance, and 0 guaranteed mithril.
Artifact Chance	9%
Loot Count	4-6
Guaranteed Mithril	0

Dark Castle Falling Bone Hazard — Falling Bone Hazard16 x 16 px · 6 frames

Dark Castle Falling Bone Hazard frame 0 — Falling Bone Hazard16 x 16 px · 6 frames

Sound	Preview	Length
Bone1		0.29s
Rock Destroy1		1.09s
Stone Clunk1		0.07s

Runtime Den Stats

Health	Den HP rolls between 11% and 16% of mountain max HP. After mountain level 100, both ends are reduced by late-game scaling but floor at 1%.
Early-level health modifier	0.7x on early mountains
Late-game health scaling	After mountain level 100, den HP percentages are reduced by 0.04 percentage points per mountain level, floored at zero before each den's 1% minimum HP floor.
Artifact Chance	9%
Max Artifact Tier	1
Loot Count	4-6
Guaranteed Mithril	0
Extra Mithril Max	1
Prestige tough-den chance	0.5% chance for a tougher den variant
Rock interval	10-21
Contact hazard	Falling Bone
Attack hazard	Falling Bone

Attack / Falling Objects

Object	HP / Damage	Radius / Gravity / Spin	Used By
Falling Bone	HP: 1 Damage: 0.6	Explosion Radius: 2 Grav: 82	Dark Castle (hit/attack)

Loot Multipliers

Loot	Multiplier
White Pearl	10
Pink Diamond	10
Diamond	1
Ruby	1
Emerald	1
Sapphire	1
Topaz	1
Amethyst	1
Large Pure Gold	1
Medium Pure Gold	1
Large Gold Ore	1.2
Sungold	0.7
Coreheart	0.7
Huge Pure Gold	0.4
Adamantine	0.4
Oathgold	0.2
Mithril	1.4