Ulkair is an incredibly powerful Great UnClean One, a Greater-Daemon of the Plague God Nurgle. Ulkair manifested on the world of Aurelia in the 40th Millennium when a Warp-Storm engulfed that planet, but he was defeated by the Blood-Ravens Space-Marine and Librarian named Azariah Kyras. But Aurelia was consumed by a Warp Storm and over the course of their mutual imprisonment Ulkair corrupted Kyras to Chaos, ultimately returning him to realspace to reunite with his Chapter and begin the process of corrupting the Blood Ravens to the service of the Ruinous-Powers and heralding the return of Ulkair himself. Ulkair's plans were ultimately disrupted only through the heroism of Captain Gabriel Angelos and his fellow Blood Ravens Loyalists.