Nathan'Yew, Tree Speaker

At the beginning of your upkeep, reveal the top
card of your library. If the revealed card is a
Treefolk, Shaman or Dryad, add {w}{g} to your
mana pool. If the revealed card is not, you may
put a land from your hand onto the battlefield.
{3}{g/w}{t}: Target land you control becomes a 2/5 Treefolk Shaman.
{5}{b/g}: Creatures you control assign their power
equal to their toughness until end of turn.