Counter target creature spell. Counter target noncreature spell. Counter target spell! Just don't let that guy get his stuff out and you're good! To finish him off if he doesn't scoop, just let a creature slip into the battlefield and mind control! BAM!
This deck works in most cases. I'm not going to lie, I've had very few losses with this deck. The only problem is that whenever I play with it, my friends have a tendency to get.. well, mad as f***! But it is really fun to play ;D
Most of the counterspells are cheap, and the more expensive ones all work out great after a few turns. Mana Leak is great in the beginning of the game, and Rewind is just bawler when your opponent tries to save up enough mana and just flush out every spell he has, hoping it will be enough to let some slip past.
The Reliquary Tower is for situations I have encountered very often, where my opponent just stops making things, and just passes the turn to me, hoing to aquire enough to blast it all out. But when I don't have to discard, he will only be giving me the advantage.
Not much more to say... Just don't let any spells resolve, and good things will happen to you!