Large Elemental, neutral
Armor Class 10
Hit Points 66 (12d10)
Speed swim +40, walk +30
Challenge 3
Skills perception +2
Damage Resistances bludgeoning, piercing, slashing
Damage Immunities poison
Condition Immunities charmed, frightened, grappled, paralyzed, petrified, poisoned, prone, restrained, stunned
Senses darkvision 60', tremorsense 60', passive Perception 12
Languages Aquan, Terran
Puddle Jump. Once on its turn can use 10 ft. of its move to step magically through body of water within reach and emerge from 2nd body of water within 60' of 1st appearing in unoccupied space within 5 ft. of 2nd. If in Huge or larger body of water can teleport to another location within same body of water.
Stench. Any creature that starts its turn within 5 ft. of swarm: poisoned until start of its next turn. (DC 12 Con negates and creature immune to swarm's Stench for 24 hrs).
Swarm. Can occupy another creature's space and vice versa and swarm can move through any opening large enough for a Tiny elemental. Can't regain hp or gain temp hp.
Bites. Melee Weapon Attack: +5 to hit, 0 ft., one creature, in the swarm's space. 14 (4d6) piercing damage + 9 (2d8) poison or 7 (2d6) piercing damage + 4 (1d8) poison if the swarm has half its hp or fewer.
Spit Swamp Sludge. Ranged Weapon Attack: +5 to hit 20/60' one target 18 (4d8) poison or 9 (2d8) poison if the swarm has half its hp or fewer.
Soggy Relocation (Recharge 5-6). While at least one creature is in swarm's space swarm uses Puddle Jump attempting to pull one creature along for the ride. Target magically teleported with swarm to swarm's destination (DC 13 Str negates).
Source: Tome of Beasts 3 · OGL/Open