Sargassum Heap

Creature 6

Large
amphibious
plant

Perception: +10; wavesense 60 feet
Skills: Athletics +17, Stealth +14; Str +5, Dex +4, Con +5, Int −4, Wis +2, Cha +0

Wavesense (Precise) 60 feet

AC: 14; Fort +17, Ref +14, Will +10
HP: 180; Immunities critical hits, precision, unconscious; Weaknesses slashing 5; Resistances cold 5

Mirage Spores (aura, incapacitation, mental) 120 feet.

The sargassum heap constantly produces a field of hallucinogenic spores that causes those affected to see the monster as whatever they desire most. Each creature within the emanation must succeed a DC 22 Will save or become Fascinated with the sargassum heap and compelled to move toward it on the creature's turn. Creatures fascinated this way are also Off-Guard. If the sargassum heap attacks, the fascinated condition ends only for the creature that is attacked. On a successful save, a creature is temporarily immune to mirage spores for 24 hours.

Speed: 10 feet, climb 10 feet, swim 25 feet

Melee ◆ tendril +17 (reach 10 feet), Damage 2d8+8 bludgeoning plus Grab

Constrict ◆ 2d8+3 bludgeoning, DC 23 basic Fortitude

Grab ◆

Source: Pathfinder Monster Core

Running this fight? Add the sargassum heap to the initiative tracker: type its name and the AC, hit points and Perception for initiative fill in, and the book button shows this stat block mid-fight.