Sources
CR
Type
Size
Alignment
Movement

Fazrian

Large Celestial, Lawful Evil

Armor Class 19 (natural armor)
Hit Points 200 (16d10 + 112)
Speed 40 ft., fly 120 ft.
STR
24
+7
DEX
20
+5
CON
24
+7
INT
19
+4
WIS
22
+6
CHA
25
+7
Saving Throws CON +12, WIS +11, CHA +12
Skills Perception +11
Damage Resistances radiant; bludgeoning, piercing, slashing, from nonmagical attacks
Condition Immunities Charmed, Exhaustion, Frightened
Senses truesight 120 ft., passive Perception 21
Languages all, telepathy 120 ft.
Challenge 16 (15,000 XP)

Traits

Angelic Weapons. Fazrian's weapon attacks are magical. When the planetar hits with any weapon, the weapon deals an extra 5d8 radiant damage (included in the attack).

Divine Awareness. Fazrian knows if it hears a lie.

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

Spellcasting

Innate Spellcasting. Fazrian's spellcasting ability is Charisma (spell save DC 20). The planetar can innately cast the following spells, requiring no material components:

At will: detect evil and good, invisibility (self only)

1/day each: commune, control weather, insect plague

3/day each: blade barrier, dispel evil and good, flame strike, raise dead

Actions

Multiattack. Fazrian makes two melee attacks.

Greatsword. Melee Weapon Attack: +12 to hit, reach 5 ft., one target. Hit:21 (4d6 + 7) slashing damage plus 22 (5d8) radiant damage.

Lore

Once an exemplar of courage and good judgment, Fazrian now seeks to destroy any creature it believes is undeserving of continued existence. Fazrian's views are a mockery of what they once were. Every creature is guilty of "deformity" in the planetar's eyes. Unless someone can swiftly prove their innocence, Fazrian sentences that individual to an immediate death.