When I opened the door he was there, surrounded by a bit of sand that actually disappeared.
A dark blue robe, torn at the edges, with a heavy breastplate covering his torso. There was an open, tall collar surrounding his head, clearly there to protect the neck, but now it didn't really matter.
His skull was practically bare, with very thin skin stretched on it, and a crown of spikes curved slightly inwards made of some silverfish alloy, which fused with his bones.
He had two rods of dark metal, levitating behind him, both at least two meters long, almost matching his height. They were crackling with lightning surging through them. Buzzing like a swarm of angry hornets.