Lunar Devil

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

Light Incorporeality. The lunar devil is translucent when standing in moonlight and is immune to damage from all nonmagical weapons in such conditions.

Lightwalking. Once on its turn, the lunar devil can use half its movement to step magically into one area of moonlight within its reach and emerge from a second area of moonlight within 80 feet of the first, appearing in an unoccupied space within that second area.

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

Multiattack. The lunar devil makes one Bite attack, one Claw attack, and one Tail attack, or it makes three Hurl Moonlight attacks.

Bite. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 16 (2d10 + 5) piercing damage plus 9 (2d8) cold damage.

Claw. Melee Weapon Attack: +8 to hit, reach 10 ft., one target. Hit: 12 (2d6 + 5) slashing damage.

Tail. Melee Weapon Attack: +8 to hit, reach 10 ft., one target. Hit: 14 (2d8 + 5) bludgeoning damage.

Hurl Moonlight. Ranged Spell Attack: +7 to hit, range 150 ft., one target. Hit: 17 (3d8 + 4) cold damage, and the target must succeed on a DC 15 Constitution saving throw or become blinded until the end of its next turn.

Summon Devil (1/Day). The lunar devil magically calls 1d4 giant owls that are Fiends with the lunar devil's damage resistances and immunities (but not its Light Incorporeality trait). The lunar devil has a 25 percent chance of calling one lunar devil instead. The called creatures arrive in 1d4 rounds, acting as allies of the devil and obeying its telepathic commands. The creatures remain for 1 hour, until the devil dies, or until the devil dismisses them as a bonus action.

Spellcasting. The lunar devil casts one of the following spells, requiring no material components and using Charisma as the spellcasting ability (spell save DC 15): At will: fly, major image 3/day: greater invisibility 1/day: wall of ice