In KH Chi they say that they were 6 masters, but one of them didn't cualified to be a foreteller... So what if the sixth master searched for his own pupils, Xehanort & Eraqus, they both had dark ambitions (That's why Eraqus's voice sounded dark in the teaser), the 6th master would tell them all about Kingdom Hearts, the X-blade, and The Keyblade War, and Xehanort was his favorite, but one day their master got corrupted by darkness, both Xehanort & Eraqus were in presence, Eraqus began to be scared of darkness, while Xehanort took his master's Keyblade & his master ambitions (Create the X-blade, do a Keyblade War, etc.) And that would explain why in BBS Eraqus is afraid of Terra's darkness, and what he says the moments before his death "My own heart is darkness"
If you have any ideas to add, or want to change something of it tell me!
In KH Chi they say that they were 6 masters, but one of them didn't cualified to be a foreteller... So what if the sixth master searched for his own pupils, Xehanort & Eraqus, they both had dark ambitions (That's why Eraqus's voice sounded dark in the teaser), the 6th master would tell them all about Kingdom Hearts, the X-blade, and The Keyblade War, and Xehanort was his favorite, but one day their master got corrupted by darkness, both Xehanort & Eraqus were in presence, Eraqus began to be scared of darkness, while Xehanort took his master's Keyblade & his master ambitions (Create the X-blade, do a Keyblade War, etc.) And that would explain why in BBS Eraqus is afraid of Terra's darkness, and what he says the moments before his death "My own heart is darkness"
If you have any ideas to add, or want to change something of it tell me!