Death Throes. When the Chraal is slain it explodes into an immense blast of cold in a 40ft radius. Every creature caught with in the blast must pass a Dexterity saving throw DC 16 or take 4d8 acid damage and 4d8 piercing damage

Acid Regeneration Whenever the Chraal is hit by an attack that deals acid damage, it instead heals for that amount instead

Multiattack. The Chraal  can make three attacks: two with its claw and one bite

Claw. Melee Weapon Attack: +9 to hit, reach 5ft., one target. Hit 2d10 + 5 slashing damage plus 1d8 acid damage

Bite. Melee Weapon Attack: +9 to hit, reach 5ft., one target. Hit 3d8 + 5 piercing damage plus 1d8 acid damage

Acid Vomit. Recharge 5-6  A 10ft line of acid extends 40ft from the Chraal. Those creatures caught in the line must pass a Dexterity saving throw DC (16) or take 10d8 points of acid damage. Those who make a successful save take half damage