Multiattack

The stoneguard makes three granite maul attacks.

Granite Maul

Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 11 (2d6 + 4) bludgeoning damage. If the attack hits, the stoneguard may also immediately cast _thunderwave_ as a bonus action. This casting uses a spell slot, but no material components.