User blog comment:Vitalius/The return of Oración Seis and Crime Sorcière/@comment-4829046-20131022143015/@comment-4829046-20131023121346

I don't think they can just absorb any element. It has to synchronize is some way. For instance, Iron conducts electricity, while Gajeel would be able to channel it, he would still receive massive shock since his entire body is filled with Iron as seen against Laxus. The Iron Shadow was an ass-pull as I've said, so I won't go there but light and shadow works well. They maybe polar opposites but one cannot exist without the other so they still synchronize especially in this case where the wielders of the magic know how to synchronize it.