Neuromuscular Zapificapacitation. Any creature hostile to Zaproughly's angel that starts its turn within 30 feet of Zaproughly's angel must make a DC 22 Wisdom saving throw. On a failed save, the creature has the effects of the slow for 1d4 rounds. Only a greater restoration can end this effect early. If a creature's saving throw is successful, the creature is immune to this for the next 24 hours.

Magic Resistance. Zaproughly's angel has advantage on saving throws against spells and other magical effects.

Zapmulet of the Holy Zap.  A very powerful amulet that makes this Pitfiend blessed with Zapmagic. This amulet makes Zaproughly's angel immune to any effect that senses evil including detect evil and good. This amulet also physically changes the shape of the pitfiend turning them into an angel. 

Magic Weapons. The pit fiend's weapon attacks are magical.

Innate Spellcasting. The pit fiend's spellcasting ability is intelligence (spell save DC 22). Zaproughly's angel can innately cast the following spells, requiring no material components:

At will: detect magic, lightning bolt

3/day each: hold monster, chain lightning

1/day each: meteor swarm

Multiattack. The Zaproughly's angel makes 3 attacks: one with its bite and two with its Zace.

Bite. Melee Weapon Attack: +13 to hit, reach 5 ft., one target. Hit: 18 (4d8)  piercing damage. The target must succeed on a DC 22 Constitution saving throw or become frightened. While frightened in this way, the target takes 21 (6d6) psychic damage at the start of each of its turns. The frightened target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.

Zaproughly's Angel's Zace. Melee or Ranged Weapon Attack: +13 to hit, reach 5 ft. or range 20/60 ft., one target. Hit: 28 (6d8) lightning damage plus 28 (6d8) bludgeoning damage and must succeed a dc 20 constitution saving throw or become paralysed for 1 minute. The target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.

Zaproughly's angel can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature's turn. Zaproughly's angel regains spent legendary actions at the start of his turn.

Zaproughly's angel 's Zace. Zaproughly's angel attacks with its mace.

Zaproughly's angel Casts a Spell (Costs 2 Actions). Zaproughly's angel casts a spell of 5th level or lower.

Zaproughly's angel Casts a Bigger Spell (Costs 3 Actions). Zaproughly's angel casts a spell of 6th level or higher.