[quote=@Burthstone]
<Snipped quote by CirusArvennicus>

I don't know enough about magic to know how to answer this.

But right now, for all intents and purposes it's still there.

As I understand Fairy Tail magic, the spell is still there it just has no power to remain active, and since it's 'deactivated', it'll either take returning to Earthland or having his mother re-activate it for it to start working again. (So using an X-Ball would have no effect on it)

Edit:
<Snipped quote by Demon Shinobi>

You can, but it'd cut into Mithera's laughing time.

...I can only imagine how hilarious a laughing dragon would look.
[/quote]

I'm glad she would finds Karn's explaining/acting out hilarious xD