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.

Slam. Melee Attack Roll: +8, reach 5 ft. Hit: 44 (6d12 + 8) Bludgeoning damage. If the target is a Large or smaller creature and the zombie moved 10+ feet straight toward it immediately before the hit, the target takes an extra 18 (4d8) Piercing damage and has the Grappled condition.

Grab. attempts to grapple a creature of medium or smaller size if the creature fails it gets grabbed by one of the amalgamation's hands the amalgamation can hold up to 3 creatures grappled at a time before it gets the consequences of grappling a creature can hold a max of five creatures.

gets 2 attack actions