I don't like this at all. It turns every counterspell into a [card]Mana Leak[/card], which is too powerful, I think -- especially at the cost you've given this. I'd much rather see something like this:
Plow the Way



Enchantment
Your spells cost

more to play.
Spells you control can't be countered.
That at least imparts some tension on the card. There's actually a reason
not to play it. That's much better, I think, than a card that totally invalidates counterspells (unlike Multani's Presence and Reignition, which simply impart a penalty on counterspells)