Barioth

Multiattack. The Barioth makes three attacks, two claw attacks and one bite attack.

Claw. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 28 (4d10 + 6) [Slashing] damage.

Bite. Melee Weapon Attack: +8 to hit, reach 10 ft., one target. Hit: 45 (6d12 +6 ) [Piercing] damage and 6 (2d6) [Cold] damage.

Tail Swipe. The Barioth sweeps its tail at its foes, knocking them back. All creatures within 10ft must make a DC18 Dexterity saving throw, taking (6d6) bludgeoning damage and (3d6) cold damage.

Vortex (Recharge on 5-6). The Barioth makes a 25ft cone beginning from itself, all creatures within this cone must make a DC18 Dexterity saving throw or take (12d6) cold damage on a failed save, and half as much on a successful one.

The Barioth has 3 legendary actions, regaining the uses of these actions at the beginning of its turn in combat.

Overdrive. The Barioth makes a Vortex attack (if Vortex is recharged).

Ice Slide (Costs 2 Actions). The Barioth moves up to half its movement speed and any creature caught in its path must make a DC18 Dexterity saving throw or take (2d6 +10) Bludgeoning damage and (2d6 +10) Cold damage and be knocked prone on a failed save. Taking half as much damage and not being knocked prone on a successful one.