Armor Class
20
Elemental Cataclysm
Gargantuan Elemental · Chaotic Neutral
Hit Points
370 (20d20 + 160)
Speed
Walk 60 ft., Burrow 60 ft., Fly 80 ft. ((hover)), Swim 80 ft.
CR
22
Traits
Earth Glide
The cataclysm can burrow through nonmagical, unworked earth and stone. While doing so, the cataclysm doesn't disturb the material it moves through.
Legendary Resistance (4/Day)
If the cataclysm fails a saving throw, it can choose to succeed instead.
Siege Monster
The cataclysm deals double damage to objects and structures.
Actions
Multiattack
The cataclysm makes two Elemental Burst attacks.
Elemental Burst
Melee or Ranged Attack +15, reach 30 ft. or range 150 ft. 25 () damage of a type chosen by the cataclysm: Acid, Cold, Fire, Lightning, or Thunder.
Cataclysmic Event Recharge 4
The cataclysm creates one of the following effects at random (roll ):
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item
1: Clinging Flames
DEX Save DC 23, each creature in a 60-foot-radius Sphere [Area Of Effect] centered on a point the cataclysm can see within 150 feet.
Failure: 45 () Fire damage.
Success: Half damage.
Success or Failure: The target starts Burning.
item
2: Freezing Waves
STR Save DC 23, each creature in a 90-foot Cone [Area Of Effect].
Failure: 22 () Bludgeoning damage plus 22 () Cold damage, and the target has the condition.
Success: Half damage only.
Success or Failure: The target's Speed is reduced to 0 until the end of its next turn.
item
3: Raging Storm
A storm cloud fills a 60-foot-radius Sphere [Area Of Effect] centered on a point the cataclysm can see within 150 feet. The cloud lasts for 1 minute or until the cataclysm uses Cataclysmic Event again. Creatures entirely in the cloud have the and conditions and can't cast spells with a Verbal component. DEX Save DC 23, each creature that enters the cloud for the first time on a turn or starts its turn there.
Failure: 18 () Lightning damage plus 18 () Thunder damage.
Success: Half damage.
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4: Swallowing Earth
STR Save DC 23, each creature in a 90-foot Cube [Area Of Effect] originating from a point on the ground within 150 feet.
Failure: 18 () Bludgeoning damage plus 18 () Acid damage, and the target has the condition and is buried under rubble. A buried target has the condition, has Cover, and is suffocating. As an action, a buried creature or another creature within 5 feet of it can make a DC 18 Strength () check. On a successful check, the creature is no longer buried.
Success: Half damage only.
list
list-hang-notitle
item
1: Clinging Flames
DEX Save DC 23, each creature in a 60-foot-radius Sphere [Area Of Effect] centered on a point the cataclysm can see within 150 feet.
Failure: 45 () Fire damage.
FireSuccess: Half damage.
Success or Failure: The target starts Burning.
item
2: Freezing Waves
STR Save DC 23, each creature in a 90-foot Cone [Area Of Effect].
Failure: 22 () Bludgeoning damage plus 22 () Cold damage, and the target has the condition.
Bludgeoning
ColdSuccess: Half damage only.
Success or Failure: The target's Speed is reduced to 0 until the end of its next turn.
item
3: Raging Storm
A storm cloud fills a 60-foot-radius Sphere [Area Of Effect] centered on a point the cataclysm can see within 150 feet. The cloud lasts for 1 minute or until the cataclysm uses Cataclysmic Event again. Creatures entirely in the cloud have the and conditions and can't cast spells with a Verbal component. DEX Save DC 23, each creature that enters the cloud for the first time on a turn or starts its turn there.
Failure: 18 () Lightning damage plus 18 () Thunder damage.
Lightning
ThunderSuccess: Half damage.
item
4: Swallowing Earth
STR Save DC 23, each creature in a 90-foot Cube [Area Of Effect] originating from a point on the ground within 150 feet.
Failure: 18 () Bludgeoning damage plus 18 () Acid damage, and the target has the condition and is buried under rubble. A buried target has the condition, has Cover, and is suffocating. As an action, a buried creature or another creature within 5 feet of it can make a DC 18 Strength () check. On a successful check, the creature is no longer buried.
AcidSuccess: Half damage only.
Legendary Actions
Eruption
The cataclysm makes one Elemental Burst attack.
Rumbling Movement
The cataclysm moves up to its Speed, Fly Speed, or Swim Speed without provoking . Each creature within 5 feet of the cataclysm as it moves is targeted once by the following effect. CON Save DC 23.
Failure: The target has the condition.
Success or Failure: The cataclysm can't take this action again until the start of its next turn.
Failure: The target has the condition.
Success or Failure: The cataclysm can't take this action again until the start of its next turn.