The World Tree

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