"It's different when that sort of power becomes part of the scenario." Actual gods, not just ones who claimed the name, ones who were truly all powerful, if not all-knowing. If Thirteen allowed Heartless in, she'd certainly be able to do what she wished to them.

Including just toss them right back out. "If we are more or less the same, though you are clearly human, I'm surprised they're a challenge. Are you ... not trained for combat?" Maybe that was something that came with the enhancements? This older version might not be as lethal.

... Sephiroth was going to have to find out. If Cloud caught wind of a weaker version around.. how long would this blue winged version live for?