Void Heritage. Zer'Ka is born of void and so is Capable of Rapid Evolution

Multi attack. Whenever Zer'Ka does the attack action it can make two blade attacks, it can replace one of the blade attacks with a acid spit attack

Multi limbed. This creature has four arms instead of 2

Sleepless. This creature doesn’t require sleep and if it takes a long rest it does so motionless for 6 hours, this creature is immune to magical sleep

Corpse Cutter. Melee Weapon Attack: +7 to hit, reach 5 ft., 1 target. Hit: 12 (1d10 + 7) Slashing damage and 15 (2d8 + 7) Poison Damage

Acidic Spit . Ranged Weapon Attack: D16 dex save to hit, range 10/30 ft., 1 target. Hit: 15 (2d8 + 7) Acid damage.