Mimicry. The Vocna Pholera has the ability to speak but only through mimicry. Any check Charisma based check the Vonca Pholera makes has advantage.

Fall Astray. The Vocna Pholera hunts using its strange ability to copy voices and pull its prey towards it. One target that can hear the cries must succeed on a DC 18 Intelligence saving throw or be drawn using all movement towards the Vocna Pholera.

Multiattack. The Vocna Pholera can make two attacks with its Claws. It may substitute one of these attacks with a Bite attack 

Bite. Melee Weapon Attack: +5 to hit, reach 5 ft, one target. Hit: 12 (2d8 + 3) Piercing damage. Can forgo damage to Grapple the target instead, DC 15 Strength Check to escape.

Rending Claw. Melee Weapon Attack: +5 to hit, reach 10 ft, one target. Hit: 8 (2d4 + 3) Slashing damage. Target must succeed a DC 15 Constitution Saving throw or take half the damage again at the start of their next turn.

Frenzy. Once the Vocna Pholera falls beneath half hit points it may make a full round of attacks as a reaction.