Multiattack. The gray render makes two attacks: one with its bite and one with its claws.

Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 14 (3d6 + 4) piercing damage. If the target is Medium or smaller, the target must succeed on a DC 16 Strength saving throw or be knocked prone.

Claws. Melee Weapon Attack: +5 to hit, reach 10 ft., one target. Hit: 11 (2d6 + 4) slashing damage, plus 4 (1d8) bludgeoning damage if the target is prone.

Bloody Rampage. When the gray render takes damage, it makes one attack with its claws against a random creature within its reach, other than its master.