Lloyd has to fight Kratos to get its help because Origin was sealed by Kratos himself . Kratos , in particular , teaches Lloyd that Mithos used the power of the `` Eternal Sword , '' a semi-mythical blade of immense power , to sunder the two worlds ; however , Lloyd would not be able to wield the sword until the seal of origin that lies inside of Kratos was broken . The duel is particularly poignant for both characters , as Kratos had recently revealed himself to be the orphaned Lloyd 's father .