Chuul

The monster can breathe air and water.

The monster senses magic within 120 feet of itself. This trait otherwise works like the Detect Magic spell but isn't itself magical.

The monster makes 2 attacks and uses .

Constitution Saving Throw: DC , one Grappled by the monster.
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.

. . If the target is a Large or smaller creature, it has the Grappled condition (escape DC ) from one of two pincers.