Uriel fought against the pulsing waves of violence that crashed against his mind, gripping his chainsword tight. From up ahead he could hear the screaming of the damned and he steeled himself for the coming confrontation. Barzano ran beside him, pale and drawn. The wailing screams from up ahead tore into Uriel’s mind, feeding the evil that pounded relentlessly on his thoughts.

He could feel that the chamber beyond was the source of the evil in his head and a miasma of gritty darkness filled the air within.Uriel charged into the pyramid-chamber of the Nightbringer, to find a scene of utter bedlam. PDF troopers convulsed on the chamber floor, faces bloody where nails and fingers had ripped eyes from their heads. Those men still conscious beat themselves bloody with broken fists, mewling in terror at nightmares only they could see.

Ultramarines Omnibus pg. 256