Planetar

Large Celestial (Angel), Lawful Good

AC 19 Initiative +10 (20)
HP 262 (21d10 + 147)
Speed 40 ft., Fly 120 ft. (hover)

Skills Perception +11
Resistances Radiant
Immunities Charmed, Exhaustion, Frightened
Senses Truesight 120 ft.; Passive Perception 21
Languages All; telepathy 120 ft.
CR 16 (XP 15,000; PB +5)

Traits

Divine Awareness. The planetar knows if it hears a lie.

Exalted Restoration. If the planetar dies outside Mount Celestia, its body disappears, and it gains a new body instantly, reviving with all its Hit Points somewhere in Mount Celestia.

Magic Resistance. The planetar has Advantage on saving throws against spells and other magical effects.

Actions

Multiattack. The planetar makes three Radiant Sword attacks or uses Holy Burst twice.

Radiant Sword. Melee Attack Roll: +12, reach 10 ft. Hit: 14 (2d6 + 7) Slashing damage plus 18 (4d8) Radiant damage.

Holy Burst. Dexterity Saving Throw: DC 20, each enemy in a 20-foot-radius Sphere centered on a point the planetar can see within 120 feet. Failure: 24 (7d6) Radiant damage. Success: Half damage.

Spellcasting. The planetar casts one of the following spells, requiring no Material components and using Charisma as spellcasting ability (spell save DC 20):
 At Will: Detect Evil and Good
 1/Day Each: Commune, Control Weather, Dispel Evil and Good, Raise Dead

Bonus Actions

Divine Aid (2/Day). The planetar casts Cure Wounds, Invisibility, Lesser Restoration, or Remove Curse, using the same spellcasting ability as Spellcasting.