Exavale

Actions

Multiattack: The Exavale can use its Petrifying Roar. It then makes for attacks: one with its bite, two with its tail, and one with slam. It can use its Swallow instead of its bite.   Tail: Melee Weapon Attack: +19 to hit, reach 40 ft., one target. Hit: 32 (5d6+10) bludgeoning damage. If the target is a creature, it must succeed on a DC 20 Strength saving throw or be knocked prone.   Bite: Melee Weapon Attack: +19 to hit, reach 10 ft., one target. Hit: 36 (4d12 + 10) piercing damage. If the target is a creature, it is Grappled (escape DC 20). Until this grapple ends, the target is Restrained, and the Exavale can't bite another target.   Petrifying Roar: The Exavale emits a howl that echoes beyond the horizon. Each creature of the Exavale's choice within 120 feet of it and aware of it must succeed on a DC 17 Wisdom saving throw or become Frightened for 1 minute. A creature can repeat the saving throw at the end of each of its turns, with disadvantage if the Exavale is within line of sight, ending the effect on itself on a success. If a creature's saving throw is successful or the effect ends for it, the creature is immune to the Exavale's Petrifying Roar for the next 24 hours.   Slam. Melee Weapon Attack: +20 to hit, reach 50 ft., 1-4 targets. Hit: 42 (7d10 + 15) bludgeoning damage. If the target is a creature, it must succeed on a DC 15 Constitution saving throw or have its hit point maximum reduced by 2d10 + 5. The target dies if this attack reduces its hit point maximum to 0. The reduction lasts until removed by the greater restoration spell or other more powerful healing spells.   Swallow: The Exavale makes one bite Attack against a Large or smaller creature it is Grappling. If the Attack hits, the target takes the bite's damage, the target is swallowed, and the grapple ends. While swallowed, the creature is Blinded and Restrained, it has total cover against attacks and other Effects outside the Exavale, and it takes 56 (16d6) acid damage at the start of each of the Exavale's turns. If the Exavale takes 60 damage or more on a single turn from a creature inside it, the Exavale must succeed on a DC 20 Constitution saving throw at the end of that turn or regurgitate all swallowed creatures, which fall prone in a space within 10 feet of the Exavale. If the Exavale dies, a swallowed creature is no longer Restrained by it and can escape from the corpse by using 30 feet of Movement, exiting prone.   Breath Weapons (Recharge 5-6): The Exavale uses one of the following breath attacks.

• Pressurized Water: The Exavale unleashes a line of water that is 90 feet long and 20 feet wide. Each creature in that area must make a DC 24 Constitution saving throw, taking 71 (13d10) piercing damage on a failed save, or half as much damage on a successful one. This ability cannot be used on land.
• Jetstream: The Exavale sprays forth a stream of hot air that is 90 feet long and 20 feet wide. Each creature in that area must make a DC 21 Constitution saving throw, taking 67 (15d8) piercing damage and becoming blinded for 1d6 rounds on a failed save. On a successful save, the creature takes half damage and is not blinded. This ability cannot be used in water.

Legendary Actions

The Exavale 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. Tarrasque regains spent legendary actions at the start of their turn.   Attack. The Exavale makes one slam attack or tail attack.   Move. The Exavale moves up to half its speed.   Chomp (Costs 2 Actions).The Exavale makes one bite attack or uses its Swallow.   Breath Weapon (Costs 3 Actions). The Exavale uses one of its breath weapons, if it is recharged.

The Exavale is a horrifyingly large creature that dwells within the waters on Deminos, a dark world at the edge of the universe. It is an amphibious serpent with dark purple scales and transparent eyes that show the fluids and blood inside its skull. It measures over four hundred feet in length, and two hundred and fifty feet in circumference at the widest point of its body. While aquatic in nature, it can (though rarely does) slither on land at high speeds. Its mouth opens to more than two hundred feet in height, and is one hundred and fifty feet wide. Its body is entirely smooth and hydrodynamic in shape, allowing it to shoot through the water with the force of its giant muscles and finned tail. It has devoured nearly all oceanic life on the planet, and only coastal ocean creatures remain, as it does not go on land unless provoked. It is unaligned, as it is a force of nature acting solely on hunger alone.