Gargantuan Elemental, typically Neutral
Armor Class 21 (natural armor)
Hit Points 307 (15d20 + 150)
Speed 40 ft., swim 40 ft.
STR
30 (+10)
DEX
10 (+0)
CON
30 (+10)
INT
2 (-4)
WIS
21 (+5)
CHA
18 (+4)
Saving Throws Wis +12, Cha +11
Damage Resistances cold, fire, lightning; bludgeoning, piercing, and slashing from nonmagical attacks
Damage Immunities poison
Condition Immunities exhaustion, paralyzed, petrified, poisoned, stunned
Senses darkvision 60 ft., tremorsense 60 ft., passive Perception 15
Languages —
Challenge 22 (41000 XP)
Proficiency Bonus +7
Legendary Resistance (3/Day).
Siege Monster.
Actions
Multiattack.
Bite.
Stomp.
Spit Rock.
Spew Debris (Recharge 5–6).
Bonus actions
Earth-Shaking Movement.
Legendary actions
Stomp.
Move.
Spit (Costs 2 Actions).
Retract (Costs 2 Actions).
Revitalize (Costs 2 Actions).
Emerge (Costs 2 Actions).