The Cosmic Gem is a mighty diamond-like jewel that is said to be able to bind a mortal being to the fabric of one universe's reality, making them what some humans would call 'a god'. Once a mortal has come into possession of the Gem they are omnipotent, omniscient and omnipresent. Only if the Cosmic Judges deem the mortal's use of their power to be harmful to the universe itself will that power be taken away. However the Judges are rather difficult to anger on this note, and only particularly destructive actions will draw their attention.
So who on Earth has discovered this mighty gem?