Corpse of King Minos

Undead nature. The Corpse of King Minos doesn't require air, food, drink, or sleep.

Mindless. The Corpse of King Minos automatically fails all intelligence and Wisdom saving throws, but is immune to psychic damage, being frightened, and being charmed.

Indescribably massive. The Corpse of King Minos is so massive that it can only be grappled and knocked prone by other gargantuan creatures. If knocked prone, every creature in a 1000 x 65616 ft. area in the direction of the falling giant must perform both a DC 17 Dexterity and DC 17 Strength saving throw, taking 200 bludgeoning damage and be instantly knocked prone and unable to stand on a failed save, or take no damage and be pushed out of the 1000 x 65616 ft. area on a successful one. All creatures within a 3000 ft. radius of the Corpse not in the 1000 x 65616 ft. area must succeed on either a DC 14 Dexterity or Strength saving throw or take 50 thunder damage and be knocked prone. This effect also applies when the Corpse dies. (These areas can be reduced if the current area is too big.)

Big target. Due to the Corpse of King Minos being so massive, all ranged attacks targeting it are guaranteed to hit.

Slow. Due to its massive size, the Corpse of King Minos is quite slow, and any of its melee attacks can be dodged with a successful DC 19 Dexterity saving throw.

Glowing Eyes. A light emits from each of the Corpse of King Minos' eyes, illuminating a 1000 ft. cone in the direction where the Corpse is currently looking,

Skeletal Serpents. When the Corpse of King Minos drops below half its normal hp, two parasitic, skeletal serpents burst out of its eyes, and it loses its glowing eyes trait. After this, King Minos is able to use Fireball and Barrage, but unable to use void ball. Each of these serpents has their own separate health pools, each with 100 hp, and have the same resistances and vulnerabilities as the Corpse. However, they also have to be targeted separately from the rest of the Corpse, meaning that a creature will have to meet Minos' 20 km height to even have a hope of damaging the serpents. If each serpent is destroyed, the Corpse of King Minos instantly dies.

Parryable. If some madlad decides they want to try and parry the Corpse's fist attack, they can actually do so. However, they must perform a DC 30 Strength saving throw. On a failed save, the fist attack has a guaranteed hit against the creature and deals double damage. On a successful save, the Corpse of King Minos takes 1000 damage, and is stunned for 2 turns. Additionally, if skeletal serpents has occurred, each of the serpents takes 50 damage.

Void Ball. The Corpse of King Minos materializes a black ball of dark energy that targets one specific creature. The ball moves 5 ft. towards its target with every one of the Corpse of King Minos' turns. If the ball enters its target's space, it bursts, and the target takes an amount of force damage that would drop it to 1 hit point, and its maximum hit points are also reduced to 1. This reduction lasts for 3 turns. The ball cannot be destroyed by any means, and only disappears either when the Corpse drops below half hp, or the ball enters its target's space. Only one void ball can exist at a time. The Corpse cannot use this action when below half hp, after Skeletal Serpents.

Fist. Unarmed Melee Attack: +15 to hit, reach 30 ft., 1 target. Hit:  113 (6d20 + 50) bludgeoning damage. If the target is large or smaller and touching the ground, it and every creature in a 90 ft. radius of it must succeed in a DC 15 Dexterity saving throw or take 40 thunder damage and be knocked prone, regardless of if the original attack affected the target or not.

Stomp. Unarmed Melee Attack: +20 to hit, reach 10 ft., 1 target. Hit: 155 (10d20 + 50) bludgeoning damage. Every creature within a 200 ft. radius of the original target (including the target) must succeed in a DC 18 Dexterity saving throw or take 50 thunder damage and be knocked prone. This attack can only be used on large or smaller enemies that are touching the ground and are below the Corpse's waist level.

Fireball. Ranged Attack: +9 to hit, reach 60/100 ft., 1 target. Hit: 49 (3d12 + 29) fire damage. This attack can only be used after Skeletal Serpents.

 Walking Mountain. When the Corpse of King Minos walks and it would step on a creature, it can choose to perform a stomp attack for half damage.

The Corpse of King Minos can choose to perform 1 legendary action, choosing from the options below. It can only perform this legendary action at the start of another creature's turn. The Corpse gains its spent legendary action at the start of its next turn.

Barrage. The Corpse of King Minos performs Fireball 10 times, or 5 times if one of the skeletal serpents is dead. The Corpse can target up to 10 separate targets with this move, and must divide the fireballs accordingly. The Corpse can only use this action after Skeletal Serpents.

Call the Void. The Corpse of King Minos uses its void ball attack.

Blinding Eyes. The Corpse of King Minos can target any creature within the area illuminated by its eyes. If the creature is looking at Minos during this action, it must perform a DC 21 Constitution saving throw, becoming blinded for 3 turns on a failed save, or 1 turn on a successful one. The Corpse cannot use this action after Skeletal Serpents.