Multiattack. The grick makes one Beak attack, one Slam attack, and one Tentacles attack.
Beak. Melee Attack Roll: +7, reach 10 ft. Hit:22 (4d8 + 4) Piercing damage.
Slam. Melee Attack Roll: +7, reach 10 ft. Hit:7 (1d6 + 4) Bludgeoning damage. If the target is a Large or smaller creature, it has the Prone condition.
Tentacles. Melee Attack Roll: +7, reach 10 ft. Hit:15 (2d10 + 4) Slashing damage. If the target is a Large or smaller creature, it has the Grappled condition (escape DC 14) from all four tentacles.
Worms That Hunt the Dark and Decaying