Aligos of the Deal

Devil's Sight. Magical darkness doesn't impede the devil's darkvision.

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

Spellcasting. The devil is an 11th-level spellcaster. Its spellcasting ability is Charisma (spell save DC 17, +7 to hit with spell attacks). The devil can cast disguise self, project image, sending,  scrying and invisibility at will.

Multiattack. The devil makes two melee attacks: with its sharp claws. It can use Hurl Discord in place of any melee attack.

Claws. Melee Weapon Attack: +9 to hit., one target. Hit: 15 (2d8 + 6) piercing damage. If the target is a creature other than an undead or a construct, it must succeed on a DC 17 Constitution saving throw or lose 10 (3d6) hit points at the start of each of its turns due to an infernal wound. Each time the devil hits the wounded target with this attack, the damage dealt by the wound increases by 10 (3d6). Any creature can take an action to stanch the wound with a successful DC 12 Wisdom (Medicine) check. The wound also closes if the target receives magical healing.

Hurl Discord. Ranged Spell Attack: +7 to hit, range 150 ft., one target. Hit: 14 (4d6) psychic damage.