Balor

At the end of each of the monster's turns, each of the monster's choice in a -foot Emanation originating from the monster takes damage.

If the monster fails a saving throw, it can choose to succeed instead.

The monster has Advantage on saving throws against spells and other magical effects.

Dexterity Save: DC 20. target: 30-foot radius, creature. Failure: 9d6 fire plus 9d6 force damage.

The monster makes one Flame Whip attack and one Lightning Blade attack.

On Hit: Huge or smaller creatures pulled 25 ft. toward attacking creature.

The monster teleports of itself up to feet to an unoccupied space the monster can see.

Melee Attack: +14 to hit. reach 10 ft. Hit: 3d8 + 8 force plus 4d10 lightning damage.