Tree of Knowledge

(The World Tree)
Tree of Knowledge enters the battlefield tapped.
{t}: Add {g}.
As long as you control six or more lands, lands
you control have "{t}: Add one mana of any
color."
{w}{w}{u}{u}{b}{b}{r}{r}{g}{g}, {t}, Sacrifice Tree of
Knowledge: Search your library for any number
of God cards, put them onto the battlefield, then
shuffle.