http://www.channelfireball.com/articles/czech-mate-2nd-at-wcmq2014-and-four-standard-decks/

As I said before, I think this deck has a good matchup against everything except UW. Chandra's Phoenix basically wins the game alone against all the black decks. I like playing Chained to the Rocks in the main deck, because every non-Revelation deck is playing creatures and it makes you much better game 1 against Mono-Blue and GW Aggro. With Chains in the deck you don't need to play the full set of Shocks, which is arguably your worst card. I think 8 four-mana burn spells is too many and like the 3/3 split because of Blood Baron. The 4th Skullcrack also moved into the sideboard for the same reason, most people are on BW or BG instead of Mono-Black and those versions don't play Gray Merchants.

Boros Reckoner in the sideboard is a great card for the mirror and decks like GW, Naya, or decks that bring in cards like Magma Spray and Mizzium Mortars against you. The 1 Assemble the Legion is for UW and Mono-Black. I don't think you want more because in those matchups you need to be very aggressive with your Mutavaults and they often end up dying, so sometimes you won't even be able to play Assemble because you won't have 5 lands.