Draw 7, keep, upkeep, draw, play a swamp, done.
Oversoul: 20
Hand: 7
Library: 52
In Play:
-Overgrown Tomb (T; swamp/forest)
Graveyard:
RFG:
Mooseman: 20
Hand: 5
Library: 52
In Play:
(T) Mountain
Leyline of Lightning ( If Leyline of Lightning is in your opening hand, you may begin the game with it in play. Whenever you play a spell, you may pay 1. If you do, Leyline of Lightning deals 1 damage to target player. )
(S) Dwarven Pony (1/1, 1R, tap: Target Dwarf gains mountainwalk until end of turn.)
Graveyard:
RFG:
BigBlue: 20
Hand: 7
Library: 52
In Play:
(T) Calderal Lake (T:1; T:U or R and ~ deals 1 dmg to me; cip tapped)
Graveyard:
RFG:
Spiderman: 20
Hand: 7
Library: 52
In Play:
(U) Plains
Graveyard:
RFG:
DarthFerret: 20
Hand: 7
Library: 52
In Play:
(U) Swamp
Graveyard:
RFG: