Crota: God of the Hive

Crota is the God of the hive, the Conqueror of Moons, the Lighteater, and the Son of Oryx, a creature that consumed a worm god in pursuit of power and understanding of the sword logic that grants eternal life through sowing the seeds of destruction throughout the numerous planes of existence. 

In his home demi plane, a vast castle floating through the astral sea, he can appear in physical form; and only there can he be killed.

He looks vaguely humanoid, with chitinous armor encasing his body, and thick, devilish horns protruding from his helm. His entire body is wreathed in green flame, but his 5 eyes burn brighter than the rest of his armor. In his stare you see the end of your world, fallen to the endless hordes of the hive, and in his blade, you see the future in which that happens. Images of burning country sides and cities flicker off of the burning green blade of crystal and bone. With every earthshaking step he takes, the moonlike oversoul that floats behind his Astral Fortress reacts and pulses in a spectrum of fire between green and orange. Non hive creatures can see a depiction of their own soul as a dull green glow the size of an apple in the center of their chest, the oversoul in comparison lights the void-like black of the Astral sea around the ship, like a small star in shape and size. It is said that his enraged roars can be heard across the Astral Sea, and Dreadnaughts know to keep their distance from the sound. Hearing it up close, you find it hard to disagree with the tales. 

 The Fortress of Crota floats through the astral sea, conquering colonies wherever they lie in the endless stretch. The throne room is circular in shape, with a raised circular runway that leads to his throne beneath the oversoul. Greenish black chitin coats the unwashed corners of the stone chamber like barnacles on a rocky seabed, and the filth eats at the ornate glass that overlooks the view of the Moon-like oversoul and the two fanglike protrusions that pierce it and draw from its power. 

Lair Actions

On initiative count 1 (losing initiative ties), Crota takes a lair action to cause one of the following effects; Crota can’t use the same effect two rounds in a row:

• Gravimetric Singularity. Any creature on the raised walkway that Crota chooses must succeed on a strength saving throw or be pulled up to 40 feet toward the center toward the center of the arena as Crota creates a singularity of heavy gravity in the middle of the arena. Any creatures that collide with one another each take 3d6 bludgeoning damage. When an effected creature reaches the singularity, the effect dissipates, dropping affected creatures to the ground. 
• The Liturgy (Only once skip on subsequent turns). A Wizard known as Ir Yut the Deathsinger spawns from fire by the black crystal in the entrance to the throne room, this wizard is singing a song of pure dread and primal fear. The Liturgy is audible to anyone in the arena that can hear, and anyone who hears it knows that if the song completes they die. The tune takes 5 rounds seconds to complete. Ir Yut takes no actions other than sing the Liturgy, and is considered restrained while she sings. She has 50 extra health atop the standard health for a Wizard. 
• Spawn the Hive. 1d6 Thralls and 1 Knight spawn in the Towers to either side of the north end of the map. The Thralls jump from the tower and pursue the nearest target. The Knights remain in position and fire with Boomers at viable targets. 
• Sword bearer Reincarnation (Next after the Mortal Shell Re-forms). The Sword bearer, a knight with 50 extra HP spawns from a door just below the Throne platform. He carries the Sword of Crota, which is the only item capable of dealing damage to Crota's Divine Core. 

Regional Effects.

Crota's Astral Fortress exists in a quantum state in the Astral Sea, existing within the Astral Sea but intangible to any creatures or objects roaming the cosmos. When the fortress passes by a location, the following effects can be observed. 

• A Source less green light shines on creatures and objects within 5 miles of the fortress, as if by an invisible green star
• Creatures with an intelligence greater than 8 that exist near the fortress for more than 3 days lose a sense of empathy and begin to pursue the sword logic as if driven by a will to survive. 
• Green fire sometimes flickers in the eyes of creatures within a mile radius of the Fortress. Those who have seen this have also reported sickness, including vomiting fat green larvae that victims swear they never ate. 
• When the Fortress Passes near an entrance to a material plane, it is magnetically drawn to it and anyone near the portal is uncomfortably aware of an impending danger. 

Crota cannot be truly killed, but destroying his body returns him and his fortress back to the very center of the astral plane, to begin its journey of conquest in a new direction.