DESCRIPTION
Though it adds inconsistancies, adding Black gives you an element of surprise, plus some additional utility. Smother is stronger than Wing Shards against Gobblins and Raffinity, and Persecute gives you the edge in the mirror or VS control. With 4 Simulacrum, balancing the mana shouldn't be a problem. I used the Urzatron as suggested by Zvi, though I worry that it will kill a 2 color deck. I should probably mention that I just randomly whipped this up, using Zvis deck as a template. At any rate, it looks strong and I think the second color is worth the effort.