He finds himself addicted to it. The way Sephiroth says his name, how he seeks for him, reassurance, salvation all of it. Genesis is drunk with the power that this sensation gives him. Knowing so suddenly and surely that Sephiroth is his. Not Shinra's, not Hojo's, not anymore.

Obviously, it goes both ways.

And what better way to celebrate that than to whisper back with a smile...

"Let's burn this place to the ground."