Oblivious

At a point in the history of man, a powerful magic was crafted into a ring. A very powerful weapon it was and it helped in the rise and fall of empires, the users were always honorable and never used it for evil, however during a certain war the current owner died in battle and the ring was lost forever. It was a dangerous form of magic and everyone on both sides searched for it, but no luck. The ring remained hidden for millennia and ended up in the hands of someone. Who is this someone?