Well some of those cards would have to be balanced *stares at* Shadowmourne. This is very well thought off. You should post this on Blizzard's Forum and see the reaction, with some luck you can turn this into a possibility or at least get the ball moving in the right direction.
Thank You. I have balanced Shadowmourne and i think it will be more situational with the 3/1 Same Effect. And where can i find the Blizzard Forums again? My mind is not working. :P