Armor Class 20 (natural armor)
Hit Points 499 (27d20 + 216)
Speed 40 ft., swim 40 ft.
STR
27 (+8)
DEX
14 (+2)
CON
26 (+8)
INT
11 (+0)
WIS
19 (+4)
CHA
16 (+3)
Saving Throws Wis +11, Cha +10
Damage Resistances fire, lightning; bludgeoning, piercing, and slashing from nonmagical attacks
Damage Immunities cold, poison
Condition Immunities charmed, exhaustion, frightened, paralyzed, petrified, poisoned
Senses darkvision 120 ft., passive Perception 14
Languages Giant, Primordial
Challenge 24 (62000 XP)
Proficiency Bonus +7
Awakening of the Scion.
Legendary Resistance (5/Day).
Magic Resistance.
Siege Monster.
Multiattack.
Slam.
Hurl Icicle.
Freezing Breath (Recharge 5–6).
Chilling Mist.