Ley-Sludge Ooze

large ooze, unaligned

D&D 5.5 / SRD 5.2

Challenge 6 (2,300 XP)

Available with DM subscription
STR
16 (+3)
DEX
6 (-2)
CON
20 (+5)
INT
1 (-5)
WIS
8 (-1)
CHA
1 (-5)

Defense

Armor Class
8 (Natural Armor)
Hit Points
105 (10d10+50 +5)
Speed
20 ft., swim 20 ft.

Treasure & Loot Common

No significant treasure

Proficiencies & Senses

Saving Throws —
Skills
—
Senses
Blindsight 60 ft. (Blind beyond this radius)
passive Perception 9

Characteristics

Damage Vulnerabilities
—
Damage Resistances
acid, necrotic
Damage Immunities
poison, psychic
Condition Immunities
blinded, charmed, deafened, exhaustion, frightened, prone, poisoned
Languages —

Traits and Actions

Amorphous

Trait
The ooze can move through a space as narrow as 1 inch wide without squeezing.

Ley Radiance

Trait
Poisoned Condition
The ooze sheds dim green light in a 20-foot radius. A creature that starts its turn in the light must succeed on a DC 13 Constitution saving throw or be Poisoned until the start of its next turn.

Corrosive Form

Trait
A creature that touches the ooze or hits it with a melee attack while within 5 feet takes 7 (2d6) acid damage.

Pseudopod

Action
Armor Class Rule
Melee Weapon Attack: +6 to hit, reach 10 ft., one target. Hit: 12 (2d8+3) bludgeoning damage plus 7 (2d6) acid damage. The target's nonmagical armor or shield takes a permanent -1 penalty to AC; destroyed if reduced to base value.

Plague Bloom

Action
Poisoned Condition
Recharge 5-6. The ooze releases a 20-foot-radius cloud of spores. Each creature in the area must make a DC 15 Constitution saving throw, taking 22 (5d8) poison damage and being Poisoned for 1 minute on a failure, or half as much damage on a success. A poisoned creature can repeat the save at the end of each of its turns.

Engulf

Bonus Action
Restrained Condition
The ooze moves up to its speed. If it enters the space of a Medium or smaller creature, that creature must make a DC 14 Dexterity saving throw or be Engulfed. An engulfed creature takes 14 (4d6) acid damage at the start of each of the ooze's turns and is Restrained and unable to breathe until it escapes with a DC 14 Strength check.

Running the encounter

Combat Behavior

Tactics

  • Drifts through flooded areas using Amorphous movement.
  • Uses Plague Bloom when three or more creatures are within 20 ft.
  • Prioritizes Engulfing targets holding light sources or key items.

Combat Style

Area Denial Controller

Appearance & presence

Monster Description

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