Biollante

Forest walk, Swamp walk, Undying
Biollante power and toughness are each equal to the number of lands in play and in the graveyard.
{b}{g}: Regenerate.
{b}{g}{5}: Destroy all artifacts, enchantments and non basic land your opponents control.
Whenever a creature dies put into play a plant, fungus, treefolk or saproling creature from your hand into play.