Untap, Upkeep (Land Tax for Mountain, Island, Plains), Draw, Savannah, Goblin Trenches. Discard Forest and Island to deal you 4 damage. Done.
Ransac
Life: 12
Hand: 7
Library: 42
In Play:
(U) Savannah (W/G)
(U) Taiga (G/R)
(U) Volcanic Island (U/R)
(T) Mountain
(T) Forest
(T) Plains
Goblin Trenches
Land Tax
Seismic Assault (Discard a Land: Deal 2 damage to target creature or player.)
Zuran Orb (Sac a land: gain 2 life)
(U) Yavimaya Elder
Graveyard: Krosan Tusker, Yaviamaya Elder, Forest, Island
RFG:
MM
Life: 20/16
Hand: 4
Library: 46
In Play:
(UTTT) Mountain 4x
(UUT) Island 3x
(T) Mishra's Factory - Land Tap: Add 1 Mana to your mana pool.
1: Until end of turn, Mishra’s Factory becomes a 2/2 Assembly-Worker artifact creature. It’s still a land.
Tap: Target Assembly-Worker gets +1/+1 until end of turn.
Graveyard:Sisters of the Flame, Hammer of Bogardan
RFG:
Ransac, cpa trash man