Untap, draw, play contamination(all lands produce black...)... attack for 6...
Train:
Life: 20
In Hand: 1
In Play: Mtn(T), Mtn(T), Mox Diamond(T), Sneak Attack, Contamination, 6 - 1/1 tokens...
GY: Mtn, D. Ritual, Symbiotic Wurm
RFG:
Wicked:
Life: 20
In Hand: 6
In Play: 2 Mtns(T, T)
GY: Incinerate
RFG