Nature's Reclamation

All nonland creatures become colorless lands
with no mana cost and "{t}: Add {g} or {w}" and
lose all other card types and abilities until
Nature's Reclamation leaves the battlefield.
At the beginning of combat during each player's
turn, that player may have target land they
control become a 4/4 Elemental creature with vigilance, trample, and haste that's still a land
until end of turn. If that player does, you gain 1
life.