Grove of the Last Oak

{x}{t}: Add X+1 {g} to your mana pool.
{g}{g}{g}: Grove of the Last Oak becomes a 2/4 Green Elemental Treefolk with your choice of reach, deathtouch or lifelink until end of turn.
{g}{g}{g}{g}{g}: Put a +1/+1 counter on each land you control. When Grove of the Last Oak becomes a creature or gains an ability that effect doesn't end. (This effect doesn't end.)