Uncanny X-Men #503 Previews Exclusive PX Variant comic book from Marvel Comics that was only available in the US as a special promotion through Diamond Comics. Written by MATT FRACTION, Pencils & Cover by GREG LAND. Who will save the X-Men from the Hellfire Cult? It's not Wolverine.It's not Cyclops. But it better be someone because they're a minute from death. And who is that mysterious red-head?