When a psychic message winged its way through space, Nyxos surfaced from the Deep Currents. He'd always been able to fall into the Flow, but never had he been able to teach another the art. It was at once beautiful and terrifying, to submerge yourself in the twisting currents of the Warp, to bring it rushing through you and let it guide your hand. A lesser man would be taken over, walked from inside like a Dreadnought by a servant of the Ruinous Powers, but to a Grey Knights Librarian and a psyker of his power, such things posed little threat, even in the Deep Currents far from the material realm.
Where the team's Blank was a hole in the Warp, a black pit, he was a beacon, blazing gold into the Immaterium with the Emperor's Light and unshakeable devotion, a Grey Knight's armour of faith magnified a hundredfold by Nyxos' psychic might. His physical countenance was similarly impressive, clad in a ten-foot suit of Tactical Dreadnought armour adorned with intricate gold-etched litanies and a deep blue-black sword almost the length of a man at his hip. The most striking feature, however, was the Psychic Hood that adorned his head, crackling with energy even inert, a visible sign of the boiling Warp energies that suffused the brain below, as were the blue Warp-lights that burned in the lenses of his Templar-pattern helmet when he drew on his power.
Ducking through the doorway with three centuries' trained grace, a stark contrast to the similarly-sized Ogryn's fumbling entry, he glanced around the room with a veteran's practiced appraisal. He nodded to the Inquisitors, and took a seat in his reinforced chair, fingers idly tracing the sword-and-book symbol on the armrest, before turning his head to look at Sten. He'd always respected the man, to come into psykerhood so late and yet rise so far. He could honestly say that Sten's precognition far outstripped his own, as did his pyrokinesis - though, to be fair, Nyxos' preferred element was the pure energy of the Warp, versatile enough that he had little use for the others, even if he was capable of them.