I clicked on white by accident...It is just blue black. The tempered steel gets in the way. The idea is getting the big guys out faster then your opponent by using heartless or grand arh.
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http://www.mtgvault.com/ViewDeck.aspx?DeckID=337768 This is My deck I am using on friday night. Your deck is very similar. Mine has been working well. If you have any questions for the reasons of any cards in mine, let me know.