I dug deep into my childhood for this custom. This Character comes from on an old episode of the Superfriends. I have always thought Superman as an evil space knight was cool as hell. So if you are unfamiliar with the story I will give a quick summary. For the full story check out "The Black Knight of Camelon" on Youtube. As always thanks for looking.

Answering a distress call in a far away galaxy, Superman speeds toward a meteorite that is heading towards a distant inhabited planet. With a super punch Superman shatters the meteor into a million pieces saving the billions of lives on the alien planet. But the meteor is made of an unknown radioactive matter and upon impact explodes with such force it knocks Superman unconscious and hurls him million of miles in space. Superman crash lands on an unknown planet and quickly discovers he has amnesia. He encounters a group of rebel space knights who intends on over throwing the King. When they discover his immense power they convince Superman he is the long lost Black Knight of Camelon leader of the rebellion. Superman dons the black armor and with his group of evil space knights easily overthrows the benevolent king Arthur 7.
The Superfriends finally track down Superman and with the Batman's superior intellect and quick wit figures out a way to regain Superman's memory.

Recipe:
Body and legs: Warmachine
Arms: Mongul
Hands: Omega Red
Wings,shoulder pads and cape: Beta Ray Bill
Head: Cast of Hush Superman from Camokids
Helmet: Wraal