 The Guardians then promote Guy as the 'Sentinel Lantern' and entrust him with guarding a group of ambassadors travelling to a planet for a crucial conference, only to subsequently release Xar, Guy's old enemy, from the Science-Cells.They presume Xar will go after Guy's family on Earth, knowing that Guy will abandon his duty and return to Earth while Xar attacks the ambassadors.The Guardians' plans have changed after Guy breaks off the attack from the Third Army and survives; the Guardians then frame Guy for failing his duty to protect the ambassadors, who were killed and expel him from the Green Lantern Corps.