User blog comment:40kfan/A Community Project Idea - Part 2/@comment-10541616-20141215232708/@comment-24909831-20141217230505

As for Chalid the Cat Crown


 * ~500.M36 - Chalid finds himself in the Warp
 * ~700.M36 - Chalid meets up with the warbands of Abaddon's "5th BC"
 * 750-800.M36 - Chalid is confronted by Xaphuris on an unknown battlefield, squirms in front of the Great Crusader of Chaos and pledges his and his followers' loyalty to Xaphuris.
 * In couple of years - Chalid rises amongst Xaphuris' ranks from a powerful invidual into lieutenant of the Coryphaus Errant as many lost to the Chaos are drawn under Chalid's service and form an incoherent warband which becomes known as the Blessed Ones

As I've said before, these dates can be brought down (earlier) if wished so and the "5th BC" can be changed to something else. I have a feeling that Chalid should be some of the first ones to join Xaphuris' cause... maybe even make a gentle reference of him as a traitor loyalist (OH NO NCF!).