A mysterious and evil ring that you found and bought from a head shop that claims to sell magical wears.
I feel like any clue whatsoever what it did, either in description or the opening prompt, would have helped. As it was, trying to find out just got it super confused about who I was.
This took a wild turn, I basically tricked the ring into serving me, and became a soul vampire sucking the soul of everyone I came across growing my power of evil.