Kholvarr, the Sunless Titan

gargantuan giant (titan), neutral-evil · CR twenty-three

by UndermountainScribe

Armor Class: 21

Hit Points: 468

Speed: 50 ft., burrow 40 ft.

Saving Throws: strength, constitution, wisdom, charisma

Damage Immunities: Cold, Necrotic, Poison

Condition Immunities: Blinded, Charmed, Frightened, Poisoned, Exhaustion

Senses: darkvision 120 ft., truesight 60 ft., passive Perception 24

Languages: Common, Giant, Primordial

Challenge: twenty-three

STR 30 (+10)

DEX 12 (+1)

CON 28 (+9)

INT 19 (+4)

WIS 24 (+7)

CHA 25 (+7)

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.
Umbral Shroud. Bright light within 30 feet of Kholvarr becomes dim light, and dim light within 30 feet becomes darkness. Nonmagical light sources brought into this area are snuffed out, and spells of 2nd level or lower that create light are suppressed while in the area.
Eclipse-Touched. Kholvarr can see normally in darkness, both magical and nonmagical, and it perceives the location of any creature touched by its darkness. It has advantage on attack rolls against any creature that cannot see it.

Umbral Fist. On a hit, cold starlessness floods the wound. A creature reduced to 0 hit points by an Umbral Fist is disintegrated into fine grey ash and can be restored only by true resurrection or a wish.
Devouring Dark. Kholvarr breathes a 90-foot cone of absolute, sunless cold. Each creature in that area makes a DC 24 Constitution saving throw, taking 54 (12d8) necrotic damage on a failed save, or half as much on a success. Nonmagical light sources in the area are snuffed out, and the area becomes magical darkness until the end of Kholvarr's next turn.

Step Through Shadow. Kholvarr teleports up to 90 feet to an unoccupied space it can see that is in dim light or darkness. It can bring the darkness with it, plunging its destination into gloom.

Collapse Into Night. The light is swallowed. Kholvarr becomes shrouded in absolute darkness until the start of its next turn; the triggering damage is halved and the triggering spell of 5th level or lower has a 50 percent chance to fail, its power draining harmlessly into the void.

Blot the Sun. Kholvarr smothers the light in a 60-foot radius. Each creature in that area must succeed on a DC 22 Wisdom saving throw or be frightened of Kholvarr until the end of its next turn; the area becomes magical darkness for the same duration.
Umbral Stride. Kholvarr moves up to its speed without provoking opportunity attacks. Every space it leaves is plunged into magical darkness until the end of its next turn.
Sunder. Kholvarr makes one Umbral Fist attack.

Spreading Darkness. Magical darkness fills a 20-foot-radius sphere centered on a point the undead creature can see within 120 feet. The darkness spreads around corners and lasts until initiative count 20 on the next round. Darkvision cannot penetrate this darkness, and no light can illuminate it.
Life-Draining Chill. A wave of life-draining cold spreads out in a 30-foot radius centered on the undead creature. Each living creature in that area must succeed on a Constitution saving throw or take cold damage and have its hit point maximum reduced by an amount equal to the damage taken.