Armor Class 20 (natural armor)
Hit Points 656 (32d20 + 320)
Speed 60 ft., fly 80 ft. (hover)
STR
30 (+10)
DEX
18 (+4)
CON
30 (+10)
INT
24 (+7)
WIS
22 (+6)
CHA
26 (+8)
Saving Throws Dex +12, Cha +16
Skills Arcana +15, Perception +14
Damage Resistances cold, fire, lightning; bludgeoning, piercing, and slashing from nonmagical attacks
Damage Immunities thunder
Condition Immunities charmed, frightened, paralyzed, petrified
Senses truesight 120 ft., passive Perception 24
Languages Giant, Primordial
Challenge 26 (90000 XP)
Proficiency Bonus +8
Flyby.
Legendary Resistance (6/Day).
Magic Resistance.
Siege Monster.
Multiattack.
Cloud Morningstar.
Wind Javelin.
Slam.
Thunderous Vortex (Recharge 5–6).
Fog of Deception.