Skip to main content
Great Unclean One

Great Unclean One

40KExtremis Boss

Greater Daemons of Nurgle, they are said to be moulded in the image of the Plague God. Malfeasant antlers crown their round heads, and their lasciviously grinning mouths drip with putrid slime. Serving as generals in Mortarion's army, they wield great corroded blades that cleave enemies. Their true strength lies in their putrid, rotund bodies. Unfortunate souls find themselves crushed beneath their immense weight, or swallowed whole to rot in their massive stomachs.

How to beat Great Unclean One

It appears at 25:00 on the run clock.

Bring its bane weapon: without it, your attacks do not lower its health bar.

Bane weapon

Weapon of the Matriarch

Evolved Ardent Blade. Unleashes a burning horizontal strike. Bane of the Great Unclean One.

How to make it

Ardent BladeMAX RANK8
Also needed
Tactical RockMAX RANK9
Open a chest while you meet all of these.Base weapon after evolving: Replaced

Getting the parts

  • Ardent Blade
    Starting weapon of: Saint Celestine
    Unlocked by:
    • Kill 1,000 Vulnerable Enemies with Saint Celestine.
  • Tactical Rock
    Unlocked by:
    • Use the Auspex to find the Tactical Rock in the Imperial Shipyard.
    • Use the Arcanoscope to find the Tactical Rock in Bloodwind Spoil.

Bestiarium stats

Wounds7,000
Strength50
Move400

Weaknesses, resistances, immunities, and skills

Weaknesses—
ResistancesBleeding, Burning, Poisoned, Slowed, Poison
ImmunitiesStasis, Disarmed, Vulnerable, Battle Shocked, Stunned, Instant Kill
SkillsHP x Level, Nurgle's Gift, HP x Current Level, Contagion

Stage locations

Objectives

Open these objectives in the checklist