Multiattack

The zombie makes two melee attacks.

Greatsword

Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 10 (2d6 + 3) slashing damage.

Grab

Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 6 (1d6 + 3) bludgeoning damage and the creature is grappled if its Medium or smaller (escape DC 13) and until the grapple ends the zombie can't grab another target.

Bite

Melee Weapon Attack: +5 to hit, reach 5 ft., one creature grappled by a zombie. Hit: 8 (1d10 + 3) piercing damage and the zombie regains hit points equal to the damage dealt.