Empyrean

Huge celestial (Titan), chaotic good (75 %) or neutral evil (25 %)
Armor Class 22 (natural armor)
Hit Points 313 (19d12 + 190)
Speed 50 ft., fly 50 ft., swim 50 ft.
STR
30 (+10)
DEX
21 (+5)
CON
30 (+10)
INT
21 (+5)
WIS
22 (+6)
CHA
27 (+8)
Saving Throws Str +17, Int +12, Wis +13, Cha +15
Skills Insight +13, Persuasion +15
Damage Immunities bludgeoning, piercing, and slashing from nonmagical attacks
Senses truesight 120 ft., passive Perception 16
Languages all
Challenge 23 (50000 XP)
Innate Spellcasting.
Legendary Resistance (3/Day).
Magic Resistance.
Magic Weapons.
Actions
Maul.
Bolt.
Legendary actions
Attack.
Bolster.
Trembling Strike (Costs 2 Actions).

This full creature's stat block is not available (not OGL).

Monster Manual
Empyrean