User blog comment:ImperiexSeed/Supernatural Mysteries/@comment-69.255.185.49-20120315222125

Perhaps, but the rings (once brought together) are also the key to Lucifer's cage, which is another angle that needs to be considered. So, we are left with 3 horsesmen doing Lucifer's bidding, Death who was obligated to Lucifer, all with rings that combined are the key to Lucifer's cage. All considered, it would not make sense that the horsemen created the rings themselves. God perhaps made them, then Lucifer used them to bind the horsemen to him? Or Lucifer made them to control the horsemen, and as a side effect, they became the key to his cage. Somewhat like "the one ring" in Lord of the Rings, destroys all evil when it is "unmade".