Every Extremis boss in Warhammer Survivors is gated behind a specific evolved weapon, and if you don’t know which base weapon feeds into which evolution, you can grind for a long time without ever seeing the fight. This breakdown covers all six bosses and the exact weapon combinations that unlock them, so you can aim your runs at the one you still need instead of guessing.
What made me put this together is how easy it is to waste a good run on the wrong pairing. Two of the recipes want Max Tactical Rock, and if you don’t have that maxed at the moment the weapon evolves, the boss simply won’t appear. I checked each combination twice before writing it down here.
The Full Unlock List at a Glance
Here’s the whole set in one table so you can scan it fast. The evolved weapon is the middle column, and the two components you need to combine are in the last one.
| Boss | Evolved Weapon | Components |
|---|---|---|
| Norn Emissary | Gauntlets of Ultramar | Power Fist + Codex Astartes |
| Great Unclean One | Weapon of the Matriarch | Ardent Blade + Max Tactical Rock |
| Ghazghkull Thraka | Bale Eye | Power Klaw + Max Da Lucky Stikk |
| Vizzik Skour: Prophet of the Horned Rat | Anti-Wizard Flintlock | Flintlock Pistols + Ardcoat |
| Trugg, The Troggoth King | Zangrom-Thaz | Fyrestorm Greataxe + Kragg Blackhammer’s Master Rune |
| Skarbrand | Uskavar the Sunderer | Stormcharged Hammer + Max Tactical Rock |
Norn Emissary — Gauntlets of Ultramar
To bring out the Norn Emissary, evolve the Power Fist together with the Codex Astartes into the Gauntlets of Ultramar. This one is straightforward as long as you keep both pieces in your build long enough to evolve them.
Ghazghkull Thraka — Bale Eye
Ghazghkull Thraka shows up once you evolve the Power Klaw with Max Da Lucky Stikk into the Bale Eye. Note the “Max” on the Da Lucky Stikk side — a half-invested version won’t do it, so push that upgrade to the top before you expect the fight.
Great Unclean One — Weapon of the Matriarch
The Great Unclean One is tied to the Weapon of the Matriarch, formed by evolving the Ardent Blade alongside Max Tactical Rock. This is one of the two recipes that demands a fully maxed Tactical Rock, so if the evolution isn’t triggering, that’s the first thing I’d check.
Vizzik Skour, Prophet of the Horned Rat — Anti-Wizard Flintlock
Vizzik Skour only appears when you evolve the Flintlock Pistols with Ardcoat into the Anti-Wizard Flintlock. A weird pairing at first glance, but that’s exactly the combination that opens the door.
Trugg, The Troggoth King — Zangrom-Thaz
For Trugg, The Troggoth King, you need Zangrom-Thaz: evolve the Fyrestorm Greataxe with Kragg Blackhammer’s Master Rune. Both components are distinctive enough that you won’t mix this one up with the others.
Skarbrand — Uskavar the Sunderer
Last up, Skarbrand arrives with Uskavar the Sunderer, which you get by evolving the Stormcharged Hammer with Max Tactical Rock. Same rule as the Great Unclean One — the Tactical Rock has to be fully maxed, so plan for it early if this is the boss you’re chasing.
Conclusion
Six bosses, six evolved weapons, and the two Max Tactical Rock recipes are the ones I’d prioritize if you’re working through the list methodically. Line up the components, max the pieces that need maxing, and the Extremis fights will follow.