Phantom Zone

Timeless Pocket Dimension created by Jor-El

Used to imprison the universe's worst criminals

Prisoners were often turned into non-corporeal phantom wraiths within the Zone

One was sent to the Zone by portals created by the Phantom Zone Bracelets, or Crystals

Once in the Zone, they did not age nor die, but they're trapped in a state of suspension

Portals often appear as floating glass shards that flatten targets into 2D states