The Dragonsabre of Serpente

From LSWiki

This is an exquisitely-crafted white steel saber.  It has brightly shining
golden runes etched into the blade.  An engraving of a serpent coiled around a
sword decorates the hilt.  It is in perfect condition.  It looks about seven
and two fifths dimins long, three quarters of a dimin wide and three
twentieths of a dimin tall.  It weighs about seven dekans.  It is giving off
light.  You are holding it.

Upon completion of Death at Corna, Railune will commit suicide. When she does this, the sabre will be on her corpse. You must retrieve the sabre from it, and then clean it with Raptorak blood. Once you have sufficiently bathed the sabre in Raptorak blood, you must take it to the Mausoleum in Corna where Necrolak is holding Serpentina's body, and raise the sabre there.