I keep checking back to see if there are more details. Is it a written work? if so, I've got a possibility in mind, based on little more then a hunch.
First, I don't think I've read the book I'm suggesting, nor can I find a decent online summary. BUT, how about "A Gathering of Heroes" by Paul Edwin Zimmer? It is a prequel to his earlier Dark Border books, "The Lost Prince" and "King Chondros' Ride". Those books stand out for me due to the incredibly detailed and (to me) sometimes tedious description of sword fighting.
Istvan the Archer (don't ask), is a world renowned swordsman, a master of the three swords school of fighting, and bears a powerful Hastur blade.
However, the setting is more otherworldly-fantasy-medieval with no explicit 'Norse' elements.