Just so we are clear. SILENCE REMOVES CHARGE! So we can just stop all that before it gets started.
As far as the card it is interesting. But it is essentially removal. Since it allows you to remove a big threat. Which is fine I suppose but when you think of it on those terms and compare it to all the other removal in the game it is far far too expensive. Overall I would say its OK but I honestly have no idea where this cards fits.