Stone Camouflage. The grick has advantage on Dexterity (Stealth) checks made to hide in rocky terrain.
Multiattack. The grick makes one attack with its tentacles. If that attack hits, the grick can make one beak attack against the same target.
Tentacles. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit:9 (2d6 + 2) slashing damage.
Beak. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit:5 (1d6 + 2) piercing damage.
The wormlike grick waits unseen, blending in with the rock of the caves and caverns it haunts. Only when prey comes near does it rear up, its four barbed tentacles unfurling to reveal its hungry, snapping beak.