Nitro Pirate said:
Using it to returning one of your stolen characters back to your own hand.
That doesn't work... GG only returns characters you "own and control" - if it let you return characters you own but someone else has taken control of, I definitely would be on the "GG is OP" bandwagon.
EDIT: Never mind, I understand what you mean.
It also just occurred to me that it can break Bolton decks too... as if it wasn't bad enough that it ends Brotherhood, targetting the right Bolton so you can slip a challenge through and claim all those jumpy Bolton guys will really hurt.
No banning is needed, but the combo with VB is tough.