Gaia, Goddes of the Earth

Indestructible, defender, protection from white
Lands you control are 2/2 elementals in addition
to their other types.
{t}: Put a +1/+1 counter on every land you
control, add {g}{g}{g}{g}{g}{u}{u}.
If Gaia, Goddess of the Earth dies, exile all permanents and all player's graveyards.