Death Throes (Demon Only). When the spirit drops to 0 Hit Points or the spell ends, the spirit explodes. Dexterity Saving Throw: DC equals your spell save DC, each creature in a 10-foot Emanation originating from the spirit. Failure: 2d10 plus this spell's level Fire damage. Success: Half damage.
Devil's Sight (Devil Only). Magical Darkness doesn't impede the spirit's Darkvision.
Magic Resistance. The spirit has Advantage on saving throws against spells and other magical effects.
Multiattack. The spirit makes a number of attacks equal to half this spell's level (round down).
Bite (Demon Only). Melee Attack Roll: Bonus equals your spell attack modifier, reach 5 ft. Hit: 1d12 + 3 + the spell's level Necrotic damage.
Claws (Yugoloth Only). Melee Attack Roll: Bonus equals your spell attack modifier, reach 5 ft. Hit: 1d8 + 3 + the spell's level Slashing damage. Immediately after the attack hits or misses, the spirit can teleport up to 30 feet to an unoccupied space it can see.
Fiery Strike (Devil Only). Melee or Ranged Attack Roll: Bonus equals your spell attack modifier, reach. 5 ft. or range 150 ft. Hit: 2d6 + 3 + the spell's level Fire damage.