Hostile Takeover. After Ekemon reforms back, he is stunned for a 2 (1d4) rounds, trying to puke everything that he consumed as Zehi. 

Multiattack. You can take two attacks during your action. 

Piercing Claw. Melee Weapon Attack: +8 to hit, reach 15 ft., one target. Hit: 20 (3d10 + 4) piercing damage. If the target is a creature, Zehi can pull the target up to 10 feet toward itself, and the target is grappled (escape DC 14). Zehi has two claws. While a claw grapples a target, the claw can attack only that target.

Swallow. Once the creature is reduced to 0, Zehi can take a full turn to consume and shred the creature. This feeds Zehi, feeding his blood and enabling him to heal for 18 (2d10 + 3). 

Shadow Stealth. While in dim light or darkness, the boneclaw takes the Hide action.