I would like to put in a comment that there is a thread for theories
As for the prophecy...
The stone is false and always has been!
Are spheres made of stone? I got nothing.
A shelter for the immortal who holds the horrid secret that damns us all!
This is where i get suspicious of you Silus; since both the Geass and Death Note fit. The Death Note has the shinigami, which is immortal, but in the anime Code Geass the ultimate manifestation of the Geass is immortality.
Beware the eye: the eye that stares into the void and, unblinking, unflinching, feeds on its power!
Again, both the Geass and Death Note fit. Geass is obvious, and the Death Note has the eye contract. The only thing is, if the benefactor made the eye contract, why would he need the bedroom doors with names on them?
TV tropes says the prophecy is about the The benefactor, but my ego says its Geass. What do you guys think?