oil Zombie

Undead Fortitude. If damage reduces the zombie to 0 Hit Points, it makes a Constitution saving throw (DC 5 plus the damage taken) unless the damage is Radiant or from a Critical Hit. On a successful save, the zombie drops to 1 Hit Point instead.

Driping oil: This zombie is combustible. Any amount of fire damage being done to it causes it to light aflame. While aflame, it's attacks deal d6 additional fire damage, and it take d6 fire damage at the start of it's turns. If it dies while aflame, it explodes, dealing 4d6 fire damage in a 10ft radius.

Overwhelm . Melee Attack Roll: +3, reach 5 ft. Hit: 8 (2d6+ 1) Bludgeoning damage and creature is Grappled (Escape DC 13). If a Zombie hits an already Grappled creature with this attack, they must made a DC 13 Strength save or be knocked prone.

Feed.  Melee Attack Roll: +3, reach 5 ft. Hit: 11 (3d6+ 1) slashing damage . more over  raging fever sweeps through the creature’s body. The creature has disadvantage on Strength checks, Strength saving throws, and attack rolls that use Strength until the nexst turn of the zombie.