Living Waterfall

Creature 5

Large
aquatic
elemental
water

Perception: +10; darkvision
Languages: Thalassic
Skills: Athletics +13, Stealth +12; Str +4, Dex +3, Con +3, Int −2, Wis +1, Cha +0

Waterbound When not touching water, the living waterfall is Slowed 1 and can't use reactions.

AC: 20; Fort +14, Ref +12, Will +10
HP: 90; Immunities bleed, paralyzed, poison, sleep; Resistances fire 5

Vortex (aura, water) 30 feet.

Water in the area that is in the same body of water as the living waterfall is difficult terrain for Swimming creatures that don't have the water trait.

Speed: 20 feet, swim 60 feet

Melee ◆ wave +15 (reach 10 feet), Damage 2d8+7 bludgeoning plus Push or Pull 5 feet

Drench ◆ (primal, water) The elemental puts out all fires in a 5-foot emanation.

It extinguishes all non-magical fires automatically and attempts to counteract magical fires (+14 counteract modifier).

Push or Pull 5 feet ◆ The living waterfall can choose whether to push or pull the creature on a successful hit.

Push ◆

Pull ◆

Source: Pathfinder Monster Core

Running this fight? Add the living waterfall 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.