Bavarik's Sword

A Holy Avenger is always retreived from the Abyss where it naturally belongs. Major Artefacts that are not of the Prime can have a destabilising effect on the world. Therefore, when Bavarik obtained the Holy Avenger, an evil artefact of equal power was released onto the Prime; this evil artefact we now know as Unglach's Stone or the Sarnim Stone, so named after Lastar Sarnim harnessed its power.