 Major storylines in this run include " Critical Mass " , where Constantine is forced to use magic to purge his darker side into another human body , in order to avoid being <unk> to Hell as part of a trade to save the possessed son of a friend , thus creating the antagonistic character , Demon Constantine , with the assistance of Aleister Crowley . The landmark hundredth issue gave more detail on John Constantine 's father , and the abusive relationship that they had shared . However , it is unclear as to whether this is happening in reality , or in his mind as John <unk> in a coma . " Last Man Standing " reveals that his friend Rich is the current descendant of King Arthur , and <unk> 's attempt to discover God 's secret , an act which would destroy England , using John 's few remaining friends as bait . 
