Chuul is a Large aberration with chaotic evil alignment and Challenge Rating 4 in the 2024 SRD. This stat block includes AC 16, 76 hit points, speeds, traits, and actions.
Multiattack - The chuul makes two Pincer attacks and uses Paralyzing Tentacles.
Pincer - Melee Attack Roll: +6, reach 10 ft. Hit: 9 (1d10 + 4) Bludgeoning damage. If the target is a Large or smaller creature, it has the Grappled condition (escape DC 14) from one of two pincers.
Paralyzing Tentacles - Constitution Saving Throw: DC 13, one creature Grappled by the chuul. Failure: The target has the Poisoned condition and repeats the save at the end of each of its turns, ending the effect on itself on a success. After 1 minute, it succeeds automatically. While Poisoned, the target has the Paralyzed condition.