User blog comment:FairyRaven/Fairy Tail Chapter 335: The Time of Life, Review and Commentary/@comment-5105419-20130620130513/@comment-203.87.139.100-20130620134156

we need a color version of this to know..

but my guess is that, she's not burnt but her skin tone change to color gray or became cyanotic.. :)

like on the other anime, when it's time magic, the surroundings will become gray or something. so maybe, hades saying that the magic will snatch the user's time, that cause her to look like color gray that stop her time. :)