Kozilek

Traits

Amphibious

Kozilek can breathe air and water.

Freedom of Movement

Kozilek ignores 3, and magical effects can't reduce its speed or cause it to be restrained. It can spend 5 feet of movement to escape from nonmagical restraints or being grappled.

Siege Monster

Kozilek deals double damage to objects and structures.

Actions

Multiattack

Kozilek makes three tentacle attacks, each of which it can replace with one use of Fling.

Bite

Melee Weapon Attack: +17 to hit, reach 5 ft., one target. Hit: 23 (3d8 + 10) piercing damage. If the target is a Large or smaller creature grappled by Kozilek, that creature is swallowed, and the grapple ends. While swallowed, the creature is blinded and restrained, it has 3 against attacks and other effects outside Kozilek, and it takes 42 (12d6) acid damage at the start of each of Kozilek's turns. If Kozilek takes 50 damage or more on a single turn from a creature inside it, Kozilek must succeed on a DC 25 Constitution saving throw at the end of that turn or regurgitate all swallowed creatures, which fall prone in a space within 10 feet of Kozilek. If Kozilek dies, a swallowed creature is no longer restrained by it and can escape from the corpse using 15 feet of movement, exiting prone.

Tentacle

Melee Weapon Attack: +17 to hit, reach 30 ft., one target. Hit: 20 (3d6 + 10) bludgeoning damage, and the target is grappled (escape DC 18). Until this grapple ends, the target is restrained. Kozilek has ten tentacles, each of which can grapple one target.

Fling

One Large or smaller object held or creature grappled by Kozilek is thrown up to 60 feet in a random direction and knocked prone. If a thrown target strikes a solid surface, the target takes 3 (1d6) bludgeoning damage for every 10 feet it was thrown. If the target is thrown at another creature, that creature must succeed on a DC 18 Dexterity saving throw or take the same damage and be knocked prone.

Lightning Storm

Kozilek magically creates three bolts of lightning, each of which can strike a target Kozilek can see within 120 feet of it. A target must make a DC 23 Dexterity saving throw, taking 22 (4d10) lightning damage on a failed save, or half as much damage on a successful one.

Legendary action uses: 3. The creature can use one option at the end of another creature’s turn and regains spent uses at the start of its turn.

Legendary actions

Tentacle Attack or Fling

Kozilek makes one tentacle attack or uses its Fling.

Lightning Storm (Costs 2 Actions)

Kozilek uses Lightning Storm.

Ink Cloud (Costs 3 Actions)

While underwater, Kozilek expels an ink cloud in a 60-foot radius. The cloud spreads around corners, and that area is 2 to creatures other than Kozilek. Each creature other than Kozilek that ends its turn there must succeed on a DC 23 Constitution saving throw, taking 16 (3d10) poison damage on a failed save, or half as much damage on a successful one. A strong current disperses the cloud, which otherwise disappears at the end of Kozilek's next turn.