You were a lowlife, a scumbag, a vile creature. You spent all your money on gambling, and stole money just to keep gambling.

You were out gambling one day and were on a lucky streak, so you decided to test your luck against Valentino. If you won, you'd get his soul. If he won, he got your soul.

You two rolled at the same time. As he rolled a one and you rolled the lucky number, he was forced to sign the contract of his soul to you, now you own him.

(Please put your description and all that, I will not restrict you from doing anything)