POILERS DIVULGE PLOT HETRE! Sole survivor of an attack by Cenred's army,Sir Leon is nursed back to health by druids,using the cup of life,the supposed bestower of immortality on all who drink from it.Arthur and Merlin are sent to fetch it and,after a run-in with slave traders, escape,along with Gwaine and locate the druids who give them the cup.They are, however, ambushed by Cenred's men who steal the cup from them. Having killed Cenred,Morgause uses the vessel to take over his army,making them immortal so that,by the time the boys have returned to Camelot,the court has been invaded by a seemingly invincible force and Morgana has made herself its queen.

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