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The Underdocks

Act 1

Act 1 features two possible starting layouts: Overgrowth and Underdocks. The Underdocks variant spans 15 rooms before the final boss room. Players can use the first three combat floors as a safe onboarding phase, as these early fights pull from a weaker pool of basic enemies designed to let you draft your core cards safely.

Monsters Encounter

Seapunk
SeapunkStandard
Corpse Slug
Corpse SlugStandard
Sludge Spinner
Sludge SpinnerStandard
Toadpole
ToadpoleStandard
Calcified Cultist
Calcified CultistStandard
Damp Cultist
Damp CultistStandard
Gremlin Merc
Gremlin MercStandard
Fat Gremlin
Fat GremlinStandard
Sneaky Gremlin
Sneaky GremlinStandard
Living Fog
Living FogStandard
Gas Bomb
Gas BombSpawned
Fossil Stalker
Fossil StalkerStandard
Haunted Ship
Haunted ShipStandard
Punch Construct
Punch ConstructStandard
Sewer Clam
Sewer ClamStandard
Two Tailed Rat
Two Tailed RatStandard

First 3 Encounters (Floor 1–3)

Drawn from a pool of weaker introductory combat variations. 3 of 4 possible encounters selected each run with equal probability.

1
Seapunk
1× Seapunk
p = 25%
2
Corpse Slug
+
Corpse Slug
2× Corpse Slugs
p = 25%
3
Toadpole
+
Toadpole
2× Toadpoles
p = 25%
4
Sludge Spinner
1× Sludge Spinner
p = 25%

Remaining Encounters (Floor 4+)

Fights after the intro floor draw from this advanced threat array using standard flat equal probability mechanics.

1
Corpse Slug
+
Corpse Slug
+
Corpse Slug
3× Corpse Slugs
p = varies
2
Calcified Cultist
+
Damp Cultist
1× Calcified Cultist+1× Damp Cultist
p = varies
3
Calcified Cultist
+
Seapunk
1× Calcified Cultist+1× Seapunk
p = varies
4
Fossil Stalker
1× Fossil Stalker
p = varies
5
Gremlin Merc
+
Fat Gremlin
+
Sneaky Gremlin
1× Gremlin Merc+1× Fat Gremlin+1× Sneaky Gremlin
p = varies
6
Haunted Ship
1× Haunted Ship
p = varies
7
Living Fog
+
Gas Bomb
1× Living Fog+1× Gas Bomb
p = varies
8
Punch Construct
1× Punch Construct
p = varies
9
Sewer Clam
1× Sewer Clam
p = varies
10
Two Tailed Rat
+
Two Tailed Rat
+
Two Tailed Rat
3× Two Tailed Rats
p = varies

Elites Encounter

Skulking Colony
Skulking ColonyElite
Phantasmal Gardener
Phantasmal GardenerElite
Terror Eel
Terror EelElite

Bosses Encounter

Waterfall Giant
Waterfall GiantAct Boss
Soul Fysh
Soul FyshAct Boss
Lagavulin Matriarch
Lagavulin MatriarchAct Boss

Events