Slam

Melee Weapon Attack: +6 to hit, 5 ft., one target, 11 (2d6+4) bludgeoning damage + 9 (2d8) fire.

Smoke Breath (Recharge 5-6)

The zombie breathes a cloud of smoke in a 15 ft. cone. Each creature in the area: 9 (2d8) fire and 7 (2d6) poison (DC 15 Con half). Smoke remains until the start of the zombie's next turn and its area is heavily obscured.