rare ce large aberration amphibious 

Perception +18; darkvision, tremorsense (imprecise) 30 feet

Languages Aklo, Undercommon

Skills Athletics +21, Nature +16, Stealth +17, Survival +16

Str +6 Dex +4 Con +4 Int +0 Wis +3 Cha +0

AC  31; Fort +21, Ref +18, Will +15

HP 140; Immunities poison

Attack of Opportunity [R]

Speed 30 feet, swim 25 feet

Melee [>] claw +22 (reach 10 feet), Damage 2d8+12 bludgeoning plus Grab

Constrict [>] 1d8+12 bludgeoning, DC 28 (grabbed by claws only)

Draining Venom (poison) Saving Throw DC 28 Fortitude

Maximum Duration 6 rounds; Stage 1 drained 1 (1 round); Stage 2 drained 2 (1 round)

Mind Feeding [>] Requirements A drained creature is grabbed by the chuul's tentacles; Effect The creature takes 3d6 mental damage.

Swamp Stride The Drukoux chuul ignores difficult terrain and greater difficult terrain in swamps.

Tentacle Transfer [>] Requirements The Drukoux chuul has a creature grabbed; Effect The chuul transfers the grabbed creature from its claws to its tentacles, or vice versa. The creature is exposed to the chuul's draining venom when transferred into the tentacles and at the start of each of the chuul's turns if it remains grabbed by the tentacles.

Abomination Vaults #3: Eyes of Empty Death, page 57.