Legendary Resistance (3/Day). If the balor fails a saving throw, it can choose to succeed instead.

Magic Resistance. The balor has Advantage on saving throws against spells and other magical effects.

Death Throes. The balor explodes when it dies. Dexterity Saving Throw: DC 20, each creature in a 30-foot Emanation originating from the balor. Failure: 31 (9d6) Fire damage plus 31 (9d6) Force damage. Success: Half damage. Failure or Success: If the balor dies outside the Abyss, it gains a new body instantly, reviving with all its Hit Points somewhere in the Abyss.

Fire Aura. At the end of each of the balor's turns, each creature in a 5-foot Emanation originating from the balor takes 13 (3d8) Fire damage.

Multiattack. The balor makes one Flame Whip attack and one Lightning Blade attack.

Flame Whip. Melee Attack Roll: +14, reach 30 ft. Hit: 18 (3d6 + 8) Force damage plus 17 (5d6) Fire damage. If the target is a Huge or smaller creature, the balor pulls the target up to 25 feet straight toward itself, and the target has the Prone condition.

Lightning Blade. Melee Attack Roll: +14, reach 10 ft. Hit: 21 (3d8 + 8) Force damage plus 22 (4d10) Lightning damage, and the target can't take Reactions until the start of the balor's next turn.

Teleport. The balor teleports itself or a willing demon within 10 feet of itself up to 60 feet to an unoccupied space the balor can see.