Nathan'Yew, Tree Speaker

At the beginning of your upkeep, reveal the top
card of your library, If it's a Treefolk, Shaman,
Dryad, or Druid, add {w}{g} to your mana pool. If
the card Is not, then you may gain life equal to
the mana cost of the revealed card.
{3}{g/w}: Creatures you control deal combat damage
with their toughness rather than their power
until end of turn.
{3}{b/g}: Exile target land, Treefolk, Shaman, Dryad,
or Druid from your graveyard, create a
2/5 Treefolk Shaman.