Pit Fiend

Melee Weapon Attack: +14 to hit, reach 5 ft., one target. Hit: 22 (4d6 + 8) piercing damage. The target must succeed on a DC 21 Constitution saving throw or become poisoned. While poisoned in this way, the target can’t regain hit points, and it takes 21 (6d6) poison damage at the start of each of its turns. The poisoned target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.

Melee Attack Roll: +14, reach 10 ft. Hit: 18 (3d6 + 8) Piercing damage. If the target is a creature, it must make the following saving throw. Constitution Saving Throw: DC 21. Failure: The target has the Poisoned condition. While Poisoned, the target can’t regain Hit Points and takes 21 (6d6) Poison damage at the start of each of its turns, and it repeats the save at the end of each of its turns, ending the effect on itself on a success. After 1 minute, it succeeds automatically.

The pit fiend makes four attacks: one with its bite, one with its claw, one with its mace, and one with its tail.

The pit fiend makes one Bite attack, two Devilish Claw attacks, and one Fiery Mace attack.

Any creature hostile to the pit fiend that starts its turn within 20 feet of the pit fiend must make a DC 21 Wisdom saving throw, unless the pit fiend is incapacitated. On a failed save, the creature is frightened until the start of its next turn. If a creature’s saving throw is successful, the creature is immune to the pit fiend’s Fear Aura for the next 24 hours.

The pit fiend emanates an aura in a 20- foot Emanation while it doesn’t have the Incapacitated condition. Wisdom Saving Throw: DC 21, any enemy that starts its turn in the aura. Failure: The target has the Frightened condition until the start of its next turn. Success: The target is immune to this pit fiend’s aura for 24 hours.

The pit fiend has advantage on saving throws against spells and other magical effects.

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