Sources
CR
Type
Size
Alignment
Movement

Firemane Angel

Medium Celestial, Chaotic Good

Armor Class 18 (plate armor)
Hit Points 135 (18d8 + 54)
Speed 40 ft., fly 120 ft.
STR
22
+6
DEX
15
+2
CON
17
+3
INT
12
+1
WIS
14
+2
CHA
23
+6
Saving Throws STR +10, WIS +6, CHA +10
Skills Insight +6, Perception +6
Damage Resistances fire, radiant; bludgeoning, piercing, slashing, from nonmagical attacks
Condition Immunities Charmed, Exhaustion, Frightened
Senses truesight 120 ft., passive Perception 16
Languages all
Challenge 12 (8,400 XP)

Traits

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.

Spellcasting

Innate Spellcasting. The angel's innate spellcasting ability is Charisma (spell save DC 18, +10 to hit with spell attacks). The angel can innately cast the following spells, requiring no material components:

1/day each: daylight, fireball (as a 6th-level spell)

3/day each: compelled duel, guiding bolt (as a 5th-level spell)

Actions

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).

Lore

Angels of the Boros Legion view themselves as the embodiments of what their creator intended. They are fierce warriors devoted to justice and dedicated to protecting the weak against evil and oppression. They are commanders, advisors, strategists, and soldiers. Their presence in battle inspires the mortal soldiers of the legion with righteous zeal.