User blog comment:IamJakuhoRaikoben/Chapter 459 & 460: Weakness & The Alighted Pegasus, Review./@comment-26323739-20151101051827/@comment-7418318-20151101135508

Maybe it has something to do with realising his own weakness.

If he's beaten, but not utterly destroyed, he can reassemble and rebuild himself to address this weakness, becomeing more powerful in his next "version".

Sayan jokes aside, I think that'd be pretty cool. And it would really force the FT mages to intentionally wipe a being out of existance after the battle, rather than just having it happen in the heat of the fight. Logical for us, but a moral problem for them I think.