Emerald City Knights
An explorer from another universe, trapped in ours
Captain Relativity was once a test pilot for a ship with an experimental black hole drive. When the drive failed catastrophically, the pilot found himself cast through a rip in the fabric of space-time, awakening in the Atlas Mountains outside Emerald City in a daze. When he made his way to civilization, he realized that he was no longer in his home dimension at all, but had somehow traveled to a parallel universe where science was less advanced and where history was different in various ways. The trip through the rift had also changed him physically, giving him control over the fabric of space-time itself… though not enough to get him home, apparently.