[quote=@Zarkun]
I'd like to point out, probably kinda late, that it was said that ANY caster mage could utilize two magics at once if the second was willingly given by the other.
[/quote]

Hopefully this isn't a spoiler to anyone reading this.

I guess that makes sense since, but would that work the same for Gajeel and Rouge's battle during the Magic Games? Since the Future Rouge kind of took control for some time.