Biollante

Forest walk, Swamp walk, Trample, Undying
Biollante power and toughness are each equal to the number of lands in play.
{g}: destroy target artifact or enchantment.
{b}{g}{1}: You may put a plant, fungus, treefolk or saproling creature card from your hand or graveyard onto the battlefield.
Whenever a creature dies, create a 3/3 green plant creature token with {t} add one mana of any color to your mana pool.