For 10 points, name this king of Norway who died at the Battle of Stamford Bridge and whose epithet may allude to his stern personality.
Immediately before this man's final battle, the opposing commander visited him and offered to give him a plot of land of "seven feet," alluding to the larger grave this man would require. He invited a rival named Einar to his farm, where he assassinated him shortly after taking the throne. In this ruler's final battle, "Orri's Storm" was a desperate counter-attack that almost won him a posthumous victory. This successor to Magnus I waged an inconclusive war with Sweyn II of Denmark before turning his attention elsewhere. He won the Battle of (*) Fulford, but would later suffer a major defeat at the site of the Derwent River. He is best known for allying with Tostig during a failed 1066 invasion of Harold Godwinson's territory. For 10 points, name this king of Norway who died at the Battle of Stamford Bridge and whose epithet may allude to his stern personality.
Immediately before this man's final battle, the opposing commander visited him and offered to give him a plot of land of "seven feet," alluding to the larger grave this man would require.
{Harald Hardrada} [accept {Harald Sigurdsson} or {Harald III}, prompt on {Harald}]