Quick answer
Mortal Shell II has 16 main campaign bosses split across Fainweald, Mammon and the Unfound Path. Most drop a unique Tarstone or weapon component, and many arenas allow a summonable Shell ally once the right bond is unlocked. The Week 1 Update reworked Warden and Urrig, polished Monolith, and fixed several boss-tracking bugs — a few launch-era “cheese it this way” takes no longer work as written.
Week 1 Update boss notes (read before following old advice)
The Week 1 Update (2026-08-29) passed over most bosses. The changes big enough to affect how you approach a fight:
| Boss | Week 1 Update change | Impact |
|---|---|---|
| Monolith | Laser and spin attacks re-timed to be consistent and readable; bad hitboxes adjusted; fixed a double-damage bug on some hits | Its old “wait for the spin” pattern is more readable now |
| Zmey | Tail grab no longer takes both Shell and Harbinger from 100 to 0 — but it still does in Night Mode | Day-mode risk removed; Night Mode stays the old threat |
| The Lost Child | No longer launches you across the arena; bite anticipation retimed | The “he throws me across the room” meme is fixed |
| Hexapod | Area attack deals more splash damage; arena smaller with a lit beacon; can’t interrupt its own shooting | The fight is much easier to read |
| Warden | Reworked: retuned attacks, new ice attacks, corrected effects | Old Warden strategies are partially outdated |
| Urrig, the Executioner | Reworked: retuned attacks, new ice attacks; spin now warns it cannot be parried | Old “parry the spin” advice is now wrong |
| Bloodcursed Lithopod | Damage, turning and jump attacks retuned; no longer nudges you into the air | Less physics-y, more honest |
| Droeg / Sir Isaac / Vrannic / Magdalena | Arena navigation and alignment fixes | Lower impact — mostly visual/fairness fixes |
The takeaway: individual boss pages quoting “X hits to stagger” or “parry this spin” should be rechecked against the current build. Boss guides on this site keep their launch-version evidence labels until re-verified against new footage.
Fainweald bosses
The opening region holds the prologue encounter and most of the early-to-mid game bosses.
| Boss | Location | Notable drop / reward | Shell ally |
|---|---|---|---|
| Gloombound Ritualist | Forlorn Village, past Village Outskirts Beacon | Gloom | — |
| Tainted Vestige | Hidden cave near Disciple’s Grotto | Gloom | — |
| Tar Golem | Disciple’s Grotto, Bone Gate path | Secret achievement | — |
| Magdalena, Lady of the Woods | Glutted Mire, Sunken Village swamp | Magdalena’s Memento (Axe & Dagger) | Smert |
| The Lost Child | Sanguine Caverns | Lost Clotstone (Obsidian Hammer, Veteran’s Battle Axe) | Tiel |
| The Nameless Captive | Prisoner’s Domain | Captive’s Scabstone (Great Martyr’s Blade) | Eredrim |
| Great Arbiter of Flesh | Southeast of Widow’s Overlook Beacon | Arbiter’s Prize | — |
| The Wandering Shepherd | Sunken Village pasture | Sheephead Totem, Tarblighted Trophy | — |
| Vrannic, the Grand Illusionist | Hall of Illusion, Mushroom Village Gate | Volatile Fragment | — |
| Broodshell Swarm | Southeast of Feeding Grounds | Justiciar’s Stone | — |
| Grisha | Flooded Village dungeon | — | — |
| Lucian, the Thirsting Knight | Hidden Keep near Stonebled Gate | Serpent Stone | — |
Mammon bosses
The second major region gates several weapons behind its dungeon bosses.
| Boss | Location | Notable drop / reward | Shell ally |
|---|---|---|---|
| Droeg, the Conqueror | Conquered Temple | Black Needle | Gragu |
| Hexapod | Withered Shoals | Axatana | Proxima |
| Isaac, the Scholar Prince | Faded Citadel | Scholar’s Wormstone (Clockwork Scythe) | Lazlo |
| Tarblighted Stoner | Sanguine Shoreline cave | — | — |
Unfound Path bosses (endgame)
The final stretch beneath Marrow Keep contains the campaign’s hardest encounters.
| Boss | Location | Notable drop / reward | Shell ally |
|---|---|---|---|
| Orrem, the Discarded Golem | Bridge of Procession | Orrem’s Head (5,000 coins) | Sariel |
| The Monolith | Obsidian Vault | Monolith Fragment (5,000 coins) | — |
| Malborn Offspring | Faithful’s Shelter | Offspring Trophy (5,000 coins) | — |
| Zmey, the Unbidden | Unfound Path central platform | New Game Plus access | — |
The Monolith was nerfed in Balance Patch 1 (-19% damage, -10% health) after community feedback about its beam phase.
Boss rewards to prioritize
If you are unsure which bosses to rush first, prioritize the ones that unlock your preferred weapon:
- Axe & Dagger → Magdalena
- Veteran’s Battle Axe / Obsidian Hammer → The Lost Child
- Great Martyr’s Blade → The Nameless Captive
- Black Needle → Droeg
- Axatana → Hexapod
- Clockwork Scythe → Isaac
Balance Patch 1 impact
Two endgame bosses saw direct nerfs:
- The Lost Child: damage -10%, health -15%
- The Monolith: damage -19%, health -10%, attack timing adjusted
Several normal enemies were also weakened, making the run-up to bosses less punishing.
Last verified: 2026-08-28.
FAQ
How many bosses are in Mortal Shell 2?
The full game contains 16 main campaign bosses across Fainweald, Mammon and the Unfound Path, plus several miniboss encounters.
Which boss drops the Lost Clotstone?
The Lost Child in the Sanguine Caverns drops the Lost Clotstone, used for the Obsidian Hammer and Veteran's Battle Axe.
Can you summon Shells for boss fights?
Yes. Many boss arenas let you summon a Shell ally if you have unlocked the corresponding bond.