The soul weapon was an interesting thing that had been discovered a while ago, and in Quinn's case it was even more different compared to others. For one, a person usually only had one soul weapon, an enhancement type or an item type, that would be related to their ability.
Yet for some reason Quinn had both. He still wasn't sure about the explanation for this. Was it because he was a human that changed into a vampire around the time that a soul weapon would manifest?
At first, it was thought that vampires could not manifest soul weapons, but thanks to Fex they had found out it wasn't true. But then why don't vampires have two soul weapons if they had abilities as well?
Thinking about it more, Quinn thought maybe it was to do with his ability itself. His ability, after all, was a god slayer ability and in a sense they could break rules that normal abilities were unable to.