The Vladlack were a humanoid species that froze planets to suit their environmental needs. The Twelfth Doctor and Clara Oswald found them attempting such an action on Eden 2. The planet fought back and thawed itself. Revealing that Eden 2 was a virtual planet designed to trap transgressors, a robot sentenced them to a thousand years hard labour per intergalactic law for the invasion of a level 1 planet. (COMIC: Freeze)