Board Thread:General Discussion/@comment-24942479-20170418071225/@comment-25926288-20171217204924

KnocknickKnock wrote: I don't remeber Fioana saying anything about breaking the laws of magic. I think you are remembering wrong. If her wand was that powerful wouldn't she had already used it instead of running scared after her original plan failed. If Emma's light was extinguished, then Fiona would be able to break the laws of magic. Sort of like tipping the balance. Even DO Sprirt told Rumple that he would be able to break the laws of magic also. So, it appears that if they extinguished the "Greatest Light" aka Emma, the balance tips over to the Darkness and Dark Magic users are more powerful, but extremely powerful ones are lined up to fill the power vacuum.

Fiona's wand can do every spell ever cast (variable on the time travel spell).

So in this case, it depends on their weapons and what state they are in.