Duskblade

The Duskblade fell with Aarathane, the co founder of the Blightslayers, during his great sacrifice that bought time for his brother, Aarathor.
The Duskblade, according to records of the Noxvale Concord, is in the Concord Guildhall, locked away in a vault. It was taken by Yvyrr, but because he could not wield it, it was passed around until eventually falling into Concordian hands.