Excellent Primer, Eric and I our good friends and constantly are discussing new ideas with different decks.

MUC is an interesting deck and if anybody likes I will write a tournament report and discuss how i handled goblins, affinity, GUW Thresh and Solidarity.

Cards in Defense

Quicksand - Though some of you really dislike the idea of loosing this to a wasteland it really can help handle aggro decks. It can kill a Piledriver, Lackey(practically any goblin), Dark Confident, Meddling Mage, Werebear(before Thresh), Hounds(Savannah and Isamaru), Soltari Priest, and Silver Knight. The card is excellent and should be vigoroulsy playtested if you are in an aggro heavy format.

Ophidian - Many say hes out of date based that he dies to Chain, Bolt, Edict, STP. On the other hand, sometimes he is very useful just to establish the board and stall a turn while you get the cards you need to win. 4th Round against GUW Thresh i had two Ophidian on the board and the card adavantage that they gave to me helped me win that round. He should be playtested before you dismiss him.

Mophling vs Meloku - Meloku is the kind of card that can drastically change the game after he resolves and you untap him. Though he still can die VERY easily to STP which is heavily run in my format area. I choose morphling because he is practically unkillable(except Edict and the new Sudden cards). He can drastically turn the game around the turn you resolve him. I feel that his description as Superman fits the terms that you play him. There has not been a game when we have played with BBS that a Morphling has resolved and we havnt won.

Brainstorm - This card is the best 1 U Blue cantrip card(that is legal in the format). Its helps pull through your deck to get the needed land drops, the access card can be shuffled away due to the Fetchlands. Omitting this card from you deck is a serious mistake. Its very valuable early gane.

Up for Discussion

Chrome Mox - This card was not considered when we were tweaking the deck before the SCG D4D. It seem very ideal in this deck, though if you are going to run it. You will probably either have to cut Impulse or Ophidian.

Arcane Labrotory - This card is an excellent card to help balance the matchup against Solidarity and IggyPop. Its an ideal card to side in and take out the Back to Basics for game two and hopefully game three.

Propoganda - The card can stabalize the board against VERY quick aggro decks. Though Most aggro decks can just pay the mana for the creatures they really need to win. I dislike this card in the Sideboard since you have other ways to handle aggro.

It all really depends on the meta of the format that you are in to dictate your choices.