User blog comment:PUNCHURPREGNANT/Gray and Silver Predictions/@comment-188.71.216.109-20140730125319/@comment-1478718-20140730142429

While I want Gray to have a powerup (he always seems to be lagging behind) I'm not sure Demon Slayer magic would do anything for him. Gray can already absorb and redirect ice magic WHILE keeping it's properties. The only thing slayer magic would do is allow him to eat ice to replenish magic power. And not only is ice harder to find than fire, slayer magic is already Natsu's thing.

I would be satisfied with a compromise: He keeps the ability to cast Demon Slayer magic by giving his ice magic creations demon slayer properties. Instead of Ice Make Lance, it's Ice Make Demon Slayer Lance