Drais said:
Don't the Spacewolves hace some newly rediscovered fleet that was lost in the Eye of Chaos?
Lost fleet? Oh, you must mean the 13th Great Company. The Wulfen disappeared into the Warp during the Heresy, hounding the Thousand Sons. During the 13th Black Crusade there were some reports of mysterious feral Space Marines engaging the Chaos forces. The description fits the long lost Wulfen.