Armor Class 18 ({@item plate armor|phb})
Hit Points 135 (18d8 + 54)
Speed 40 ft., fly 120 ft.
Saving Throws STR +10, WIS +6, CHA +10
Skills Insight +6, Perception +6
Damage Resistances fire, radiant, [object Object]
Condition Immunities charmed, exhaustion, frightened
Senses truesight 120 ft., passive Perception 16
Languages all
Challenge 12
Flyby. The angel doesn't provoke an opportunity attack when it flies out of an enemy's reach.
Magic Resistance. The angel has advantage on saving throws against spells and other magical effects.
Relentless (Recharges after a Short or Long Rest). If the angel takes 21 damage or less that would reduce it to 0 hit points, it is reduced to 1 hit point instead.
Multiattack. The angel makes two melee attacks.
Longsword. Melee Weapon Attack: +10 to hit, reach 5 ft., one target. Hit: 10 (1d8 + 6) slashing damage, or 11 (1d10 + 6) slashing damage if used with two hands, plus 22 (5d8) fire or radiant damage (angel's choice).
Guildmaster's Guide to Ravnica, p. 190