UUD, Plains, Lightwalker, Map the Wastes bolstering Lightwalker, get a Swamp, Outlast Mer-Ek Nightblade, done.
Spidey: 21
Hand: 2
Library: 47
Battlefield:
(U,U) Forest x2
(U,U,U) Plains x3
(U) Blossoming Sands (~ ETB tapped.; When ~ ETB, I gain 1 life,; T: Add G or W to my mana pool)...