The prison was both locked in a bubble outside the universe and timelocked. (PROSE: Shada) It was contaneid by a quantum wall and its surface was patrolled by robot guardians. (COMIC: The One) The prisoners of Shada were stored each in their own separate cryogenic cell, alive, but frozen in time, in perpetual imprisonment. (PROSE: Shada) They had dragon tattoos which snapped upon their release. (PROSE: Christmas on a Rational Planet)