Nightmare of Crota, Son of Oryx
From Destinypedia, the Destiny wiki
Nightmare of Crota, Son of Oryx is a Nightmare of Crota, Son of Oryx that appears in Shadowkeep. It takes the form that would have been adopted by Crota during the Great Disaster and if he had been successfully reawakened and entered our realm during The Dark Below. The Nightmare of Crota, can be defeated in the activity Nightmare hunt: Despair on the Moon.
The Nightmare of Crota serves as the final boss of the Shadowkeep story campaign after the Guardians are coaxed into entering the Pyramid beneath the Hive Scarlet Keep. After the Guardian succeeds in destroying the Nightmares of Dominus Ghaul and Fikrul, the Fanatic, the Guardian finally confronts the final Nightmare of one of their most dangerous foes. The Guardian repeats history as they defeat the Hope Eater Nightmare in a manner similar to his final defeat, allowing the Guardian to reach the center of the Pyramid, gaining an audience with the Darkness itself.
Following this encounter, the Guardians, under Eris Morn's instructions, conduct Nightmare Hunts to keep the Pyramid's influence at bay. The Pyramids power continually brings back the Nightmare of Crota, representing the Essence of Despair, forcing the Guardians to battle with the Hive Prince again. After a daring struggle, the Guardians use Crota's blades again to weaken and then finally slay the Nightmare once more.
The Nightmare of Crota looks much different than his normal appearance in Crota's End, with a far more physical look with chitin and armor, instead of the ethereal and unique appearance he last appeared with. Along with that, his color scheme was changed from light green with some yellow hue on his horns, to a pure green armor with a dark brown skin color underneath.