Q (Star Trek)

Q is an extra-dimensional being of unknown origin who possesses immeasurable power over time, space, the laws of physics, and reality itself, being capable of altering it to his whim. Despite his vast knowledge and experience spanning untold eons, he is not above practical jokes for his own personal amusement, for a Machiavellian or manipulative purpose, or to prove a point. He is said to be almost completely omnipotent and he is continually evasive regarding his true motivations. Q enjoys letting people know about how powerful he is, and playing games with that knowledge. He snaps his fingers to bend reality and shows up in flashes of white when he teleports.