Infused Black Broadsword

You are looking at a broadsword with a blade of black metal atop an ornately worked silver handle and guard.
The blade emits a soft blue glow, and the pommel bears the mark of the master smith Ironbar, from the Island of Kesmai, but around it is carved a circle of flames

Stats

 Combat Adds +5
 AC +5
 blue glow.
 It deals increased damage 
 Ties when picked up. 

How to obtain

To upgrade your black broadsword to a demonically infused black broadsword, you must travel to Leng and slay the dragon Kosh. You must land the killing blow. This will impress Sorceress Althacrex at the end of the gauntlet on -6 Oakvael, who will upgrade your sword.