Multiattack

The web zombie makes two slam attacks. If both attacks hit a Medium or smaller target, the target is restrained by webbing. As an action, the restrained target can make a DC 11 Strength check, bursting the webbing on a success. The webbing can also be attacked and destroyed (AC 10; hp 5; vulnerability to fire damage; immunity to bludgeoning, necrotic, poison, and psychic damage).

Slam

Melee Weapon Attack: +3 to hit, reach 5 ft., one target. Hit: 4 (1d6 + 1) bludgeoning damage.