In the fluff this might mean the elvish master smith imbued a weapon with magic or the dark god follower was granted a boon by his god and his sword was darkly blessed. Certainly the Vermin Swarm would not call that shiny weapon a "Hero's Sword" and the Dread Elves wouldn't either. But somehow they all managed to create this extra handy scroll that dispels a spell. Perhaps it's really a scroll for the Elves. For the Orc Shaman it might be a bone, prepared in a special ritual, that upon breaking will dispel the spell?
Assistant Head of Art Team