User blog comment:IamJakuhoRaikoben/Chapter 503: The Last Sight Seen, Review./@comment-26389992-20160927234319/@comment-26389992-20160928000403

Nah, I'm saying a win-win for the readers but it is a win-win for Gray too. I mean Sliver passed on his magic just so he can defeat END, not Natsu. Gray might find a way to neutralize the demonic power that causing him to exert END's aura without killing Natsu.

At the same time, not gonna be surprised if Gray isn't fully on board with his convictions. Invel stated no matter what you do, Devil Slayer Magic eats at you so he might start having dark intentions