Battle of Hamagora
The battle began when the 2nd Company of then newly reformed Scythes of the Emperor Chapter found itself under siege upon the hive world of Hamagora. The Scythes were assailed by an endless swarm of Nurgle Daemons. Intercessor Squads established a series of kill-zones among the ruins of hive Agrippa, yet for every Daemon they slew, two more emerged and their casualties begin to mount.
Meanwhile, operating in total secrecy, the Grey Knights Strike Force Harbinger of the 5th Brotherhood teleported into the sub-city. Their quarry was the Great Unclean One Gul'gulm'ga'tol. After a bloody battle, the strike team sent Gul'gulm'ga'tol screaming into the warp. Hamagora was saved, though the Scythes never discovered how.