Undying Tarrasque

Turn Immunity The tarrasque is immune to effects that would turn undead.

Life Sense It can pinpoint the presence of any living creature within 6 miles of it.

Withering Aura Whenever a creature within 120ft. of the tarrasque regains hitpoints, it regains 0 hitpoints and takes necrotic damage equal to the amount healed.

Undying Fortitude When it is reduced to 0 hitpoints, the tarrasque can make a Constitution saving throw with a DC equal to half the damage dealt (minimum 10). On a success, the tarrasque drops to 1 hitpoint instead.

Necrotic Breath(Recharge 5-6) Creatures within a 120ft. cone must succeed a Constitution saving throw of 22 or take 99(18d10) necrotic damage on a failed saving throw. Creatures that fail this save have its hitpoint maximum reduced by this amount. If this reduces a creature to 0 hitpoints, it rises as an zombie at the start of the tarrasque's next turn. On a success, creatures take half damage.If the creature is undead, it takes 0 damage and gains temporary hitpoints equal to half the amount of damage dealt.

Multiattack The tarrasque can make four attacks on its turn: One with its bite, two with its claws and one with its tail. It can choose to substitute its two claw attacks for a rock attack.

Bite. +19 to hit:, 15ft. , one target. Hit 36(4d12+10) piercing damage. If the target is Huge or smaller, it is swallowed. While swallowed, the creature is blinded and restrained and has total cover against attacks and other effects outside the tarrasque, and takes 63(18d6) acid damage at the start o0f each of the tarrasque's turns. If the tarrasque takes damage from a creature inside of it, it must succeed a Constitution saving throw equal to half the damage dealt by that creature (minimum 10). On a failed save, it regurgitates all swallowed creatures which fall prone in a space within 15 ft. of the tarrasque. if the tarrasque dies, it is no longer restrained by it and can escape from the corpse by using 30ft. of movement, exiting prone.

Claw +19 to hit: 20ft., one target. Hit 14(4d8+10) slashing damage.

Tail +19 to hit: 30ft., one target. Hit 32(4d10+10) bludgeoning damage. If the target is a creature, it must succeed a DC 27 Strength saving throw or be knocked prone.

Stomp +10 to hit: 5ft., all targets in range. Hit 38(5d10+10) bludgeoning damage.

Stone +19 to hit: 200/800ft., one target. Hit 43(5d12+10) bludgeoning damage. If the target is a creature, it must succeed a DC 27 Strength saving throw or be knocked restrained. It must use its action to escape (DC 27)

The tarrasque can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature’s turn. The tarrasque regains spent legendary actions at the start of its turn.

Attack. The tarrasque makes one claw attack or tail attack.

Move. The tarrasque moves up to half its speed.

Chomp (Costs 2 Actions). The tarrasque makes one bite attack or uses its Swallow.

Mythic Transformation(Recharges after short or long rest)

Spectral Transformation The tarrasque's body begins to glow with ethereal light as its essence becomes that of a wraith. As it transforms, it emits a soul-tearing screech that rips the very life force from its foes. This effect ends after a short or long rest or until it regains at least half its hitpoint maximum.

• Effect When the tarrasque drops to 100 hitpoints or fewer, and it gains immunity to non-magical bludgeoning, piercing, and slashing damage and resistance to acid, fire, lightning, and thunder damage. It can move through objects and Gargantuan creatures as if they were difficult terrain. It takes 6 (1d10) force damage if it ends its turn inside an object.

Death Bellow When it enters its Mythic transformation, the tarrasque forces all creatures in a 120ft. radius to succeed a DC 22 Constitution saving throw. On a failure, a creature drops to 0 hitpoints. Creatures reduced to 0 hitpoints by its death below arise as a specter at the start of its next turn.

Death Aura Creatures that start its turn or first enter within 120ft. of the tarrasque take 11(2d10) necrotic damage and has its hitpoint maximum reduced by this amount. If the creature is an undead, it gains 11(2d10) temporary hitpoints. Creatures that are reduced to 0 hitpoints while in this aura arise as an undead zombie.