Asgrim the Dreadkiller is a banner hanging in the Tomb of the Old Kings on Shield's Rest in Stormheim.
Asgrim the Dreadkiller
Here lies Asgrim the Dreadkiller. His hatred for the kvaldir was unmatched and he made it his life's work to slay as many of Helya's minions as possible.
His deeds were so great, Helya sent the Naglfar for him. Though it cost him his life and his warband, he sent the dread ship emptyhanded back to Helheim.