User blog comment:IamJakuhoRaikoben/Chapter 394: Juvia vs. Keith, Review./@comment-24800928-20140725181935/@comment-24066070-20140726080258

I think Gray's IDS will be like Natsu's Lightning.

It will be exhausting to use and even then it won't be as strong as Silver's, just like Natsu's lightning isn't as strong as Laxus'