Demonic Weapons. The abyssal angel's weapon attacks are magical. When the angel hits with any weapon, the weapon deals an extra 4d8 necrotic damage (included in the attack).

Innate Spellcasting. The angel's spellcasting ability is Charisma (spell save DC 20). The angel can innately cast the following spells, requiring no material components:

At will: detect evil and good, invisibility (self only)

3/day each: blade barrier, dispel evil and good, flame strike, circle of death, darkness

1/day each: commune, contagion, finger of death

Magic Resistance. The angel has advantage on saving throws against spells and other magical effects.

Multiattack. The angel makes two melee attacks.

Greatsword. Melee Weapon Attack: +14 to hit, reach 5 ft., one target. Hit: 22 (4d6 + 8) slashing damage plus 18 (4d8) necrotic damage.

The Abyssal Angel has 3 legendary actions:

Spell from the Abyss. The Abyssal Angel may use one of its At Will or 3/Day spells.

At will: detect evil and good, invisibility (self only)

3/day each: blade barrier, dispel evil and good, flame strike, circle of death, darkness

Greatsword (costs 2). Melee Weapon Attack: +14 to hit, reach 5 ft., one target. Hit: 22 (4d6 + 8) slashing damage plus 18 (4d8) necrotic damage.