The Quantum Mechanics

The Quantum Mechanics was a cosmic being born at the Big Bang. They feared death. Because of the latter and their inability to think of what an afterlife would be like, they created thousands of agents to gather information of different views of the afterlife in order to create themselves a perfect heaven. In order to create a "ladder to heaven", they started to kidnap entire planets (including the Earth). When part of Quantum Mechanics threaten to destroy said worlds, the JLA had to battle them and eventually help all of QM enter a higher plane of existence.
They had godlike powers allowing them to do nearly everything they could think of and teleport.
References:
http://www.comicvine.com/the-quantum-mechanics/4005-11284/