Tarrowmaw, the Glacial Hunger

gargantuan elemental (titan, cold), neutral-evil · CR twenty-four

by RimeAndRuin

Armor Class: 20

Hit Points: 518

Speed: 50 ft., burrow 40 ft.

Saving Throws: strength, constitution, wisdom, charisma

Damage Immunities: Bludgeoning (nonmagical), Cold, Piercing (nonmagical), Slashing (nonmagical)

Damage Vulnerabilities: Fire

Condition Immunities: Charmed, Frightened, Paralyzed, Petrified, Poisoned, Exhaustion

Senses: blindsight 60 ft., darkvision 120 ft., passive Perception 19

Languages: Common, Primordial

Challenge: twenty-four

STR 28 (+9)

DEX 12 (+1)

CON 26 (+8)

INT 14 (+2)

WIS 20 (+5)

CHA 22 (+6)

Traits

Legendary Resistance (3/Day). If the creature fails a saving throw, it can choose to succeed instead.
Magic Resistance. The creature has advantage on saving throws against spells and other magical effects.
Aura of Absolute Cold. At the start of each of Tarrowmaw's turns, each creature within 20 feet of it takes 11 (2d10) cold damage, and nonmagical flames within that area are extinguished. Water within 20 feet that isn't being worn or carried freezes solid.
Siege Monster. Tarrowmaw deals double damage to objects and structures.

Avalanche Slam. If the target is a creature, it must succeed on a DC 24 Strength saving throw or be knocked prone and pushed up to 15 feet away. Difficult terrain of jagged ice fills the target's former space until the end of Tarrowmaw's next turn.
Devouring Bite. The target is grappled (escape DC 22) if it is a Huge or smaller creature. Until this grapple ends, the target is restrained, and Tarrowmaw can't bite another target.
Rimebreath. Tarrowmaw exhales a roaring gale of glacial wind in a 90-foot cone. Each creature in that area makes a DC 24 Constitution saving throw, taking the cold damage on a failed save, or half as much on a success. A creature that fails is also restrained by encasing rime until the end of its next turn.

Glacial Stride. Tarrowmaw moves up to half its speed. This movement ignores difficult terrain made of ice, snow, or rubble, and any creature whose space it enters or leaves must succeed on a DC 24 Strength saving throw or be knocked prone.

Shatterfrost Riposte. Brittle ice erupts from Tarrowmaw's wound. The attacker takes 18 (4d8) cold damage and must succeed on a DC 24 Constitution saving throw or have its speed reduced to 0 until the end of its next turn.