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Grim Dawn Armorum Excrementis Set Guide: Fangs of Asterkarn Secret Quest Walkthrough

Yes, it's the poop set. Yes, it's absurd. Yes, the grind is 100% real. I've run this chain start to finish, and here's the exact route — no filler, just the steps that matter.

 

Grim Dawn Armorum Excrementis Set Guide: Fangs of Asterkarn Secret Quest Walkthrough



 

Before You Start

Don't attempt this on a fresh build. You need:

  • Ultimate difficulty — several interactions only trigger here
  • Fangs of Asterkarn DLC
  • Revered reputation with Nocturn Cary
  • Iron, Skeleton Key, Dynamite, crafting mats
  • Strong Acid/Poison resistance — this fight punishes squishy builds

 

Step 1: Unlock Nocturn Cary & Hit Revered

Go to Guardian's Sorrow Rift → head left → hidden path down to a river → cross it → move up to a cave → talk to the raven NPC.

 

Farm the repeatable faction quest until Revered. Use the Ascension Altar with Aetherial Shards to speed things up — it boosts rep gain but scales up world difficulty too.

 

Buy Oculorum (reveals hidden containers) and Primordius (contagion protection). You need both. Don't skip.

 

Step 2: Collect 6 Shadowheart Swords

# Location How
1 Hargate's Other Isle Foggy Banks → south to house → Cultist's Lair → boat
2 Smuggler's Pass NW into Aether path, grab fast, ground damages you
3 Griever's Mill West of Blood Grove Rift, break urn in mountain wall
4 Sanctum of Flesh Aether path left of Ashes of Malmouth final boss
5 Port Valbury Random dungeon vendor, ~70,000 Iron
6 New Harbor South of Old Arkovia, house at road's end

 

Don't stand in Aether ground grabbing #2 — grab and go. The Port Valbury vendor is random, so check every vendor while doing other Nocturn Cary runs to avoid a wasted trip back.

 

Step 3: Craft Shadowheart (Key Item #1)

Farm 50 Tainted Meat from boars around Dread Wastes / Black Citadel.

 

Head to Black Citadel Rift → southeast → down the stairs → Purifying Altar. Offer the meat, then the swords. You get Shadowheart.

 

Step 4: Reveal 18 Mushroom Patches

Apply Oculorum to a flask, visit each patch, use flask, loot the container that spawns. Order doesn't matter — hit all 18, spread across the map.

 

The 18th is at Pilgrim's Rest, right by the secret door. Looting it gives you the beaver transformation relic. Yes, you now become a beaver. Commit to it.

 

Step 5: Wooden Carving (Key Item #2)

Farm 250 Wood Chips from beavers at Volder's River — 5-6 spawn groups per loop, reset by exiting to menu. Roughly 30 minutes per full run.

 

Then:

1. Transform into a beaver

2. Give 250 Wood Chips to RickRick (south of Kern Hold) → get 5 Wooden Logs

3. Travel to Frostvale Highlands, go north, find MukMuk

4. Transform again, hand over the logs → get Wooden Carving

 

Step 6: Patch Note (Key Item #3)

At Pilgrim's Rest, head east to find Belladonna. Answer her riddles correctly — read them, don't spam-click. Two chests open; one drops the Patch Note.

 

You now have all three door keys: Shadowheart, Wooden Carving, Patch Note.

 

Step 7: Open the Door & Clear The Threshold Between

Apply Oculorum and Primordius before you go. Return to Pilgrim's Rest, go east, use all three items on the stone door.

 

Inside: use your flask, spend 1 Skeleton Key on the devotion shrine.

 

Maze rule: pick the entrance with 10 lit candles. Wrong pick? Just retry. Don't overthink the visuals — count candles, move on.

 

Step 8: Nicroak & Excremental

Keep Primordius active (refresh every ~30 sec), push north through beavers to Beaver's Crossing. Near the town entrance, find a hole leading down.

 

Nicroak, First of the Chosen drops Dung Divider — required for the set.

 

Next: Excremental at Devil's Crossing. Acid/Poison damage, millions of HP, high avoidance. Overcap your resistances before this fight — bosses in this expansion shred them fast.

 

Kill Excremental → unlock the Outhouse, your crafting station for the set.

 

Step 9: Farm the Remaining Pieces

Item Location Notes
Cauldron of Excitement (helm) Mount Tyr Break wall with Dynamite, go NE, loot corpse
Off-hand / Gloves Bonebleach Basin Forgotten Gods-linked area, DoT zone — hug cover
Soul Trousers Random world drop Use Ascension Altar + Aetherial Mutagen for better Acid/Poison drop odds

 

Soul Trousers is the RNG bottleneck. Farm dense zones, not open-world clears — more mob density means more rolls per hour.

 

Step 10: Craft the Set & Mark of Nerf

At the Outhouse, each piece costs 8 Ashes of Awakening + 200,000 Iron Bits plus a piece-specific component.

 

Craft the Mark of Nerf too — it's your ticket to the celestial boss.

 

Step 11: The Celestial Boss

Reapply Primordius. Head back through Pilgrim's Rest into The Threshold Between — the maze is now shortcut-skippable. Push north to Beaver's Crossing, enter the arena.

 

Both normal and Uber versions drop Huge Wood (2H sword). The Uber-only reward is a special medallion. Only attempt Uber if your build handles superbosses comfortably — this fight does not forgive weak sustain.

 

FAQ

What difficulty do I need for Armorum Excrementis?

Ultimate. Multiple steps flat-out require it.

 

Where's the secret door?

Pilgrim's Rest, east of the waypoint. Needs Shadowheart, Wooden Carving, Patch Note.

 

Why do I need Nocturn Cary reputation?

To buy Oculorum (reveals mushroom containers) and Primordius (contagion protection). Both are mandatory later.

 

How does the Threshold Between maze work?

Pick the entrance with 10 lit candles. Wrong guess just means a retry — no permanent penalty.

 

Where does Dung Divider drop?

Nicroak, First of the Chosen, found through a hole near Beaver's Crossing after the maze.

 

Bottom Line

This is three parallel key-item grinds funneled into one door, followed by two boss fights and a scavenger hunt for set pieces:

 

1. Rep up Nocturn Cary, grab both formulas

2. Collect 6 Shadowheart swords + 50 Tainted Meat

3. Reveal 18 mushroom patches, get the beaver relic

4. Farm 250 Wood Chips → Wooden Carving via RickRick/MukMuk

5. Solve Belladonna's riddles for the Patch Note

6. Open the door, clear the candle maze

7. Kill Nicroak and Excremental, unlock the Outhouse

8. Farm helm, gloves, off-hand, and the RNG-cursed Soul Trousers

9. Craft the set + Mark of Nerf, take down the celestial boss

 

Long grind, zero mystery once it's broken into stages. Keep your flasks stocked, resistances overcapped, and just work the checklist.

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