Perhaps the coolest sword ever in the real world.
Ulfberht is a name given to unique Viking swords used throughout Scandinavia more than a thousand years ago, featuring steel of a quality that would not be equaled until 1,000 years later, in the Industrial Revolution. Alan Williams, a British historian, claimed that the Ulfberht was "the greatest sword ever made", and surpassing weapons like the katana and longsword. Only 171 such swords have been found so far, but only a few are authentic Ulfberht swords. The earliest date from 850 -Wiki