[This is a popular theory, Sephiroth has much the same idea.]

I wouldn't put anything past that man. Though, considering his track record it's somewhat less physical than before. Well as far as actual physicality can be taken here.

[Sephiroth pauses, seeming to lose himself in a glare at one or two of his shadows as he ponders.]

It's hardly an experiment on the populace as a whole, being as personal as these monsters seem to be.