Ancestral Burial Ground

Ancestral Burial Ground enters the battlefield
tapped.
{t}: Add {w},{b}, or {g}.
{1}{w}{b}{g}, {t}: Look at the top X cards of your library, where X is the number of creatures you control plus the number of creatures in your graveyard. You may put a creature from among
those cards into your graveyard. Put the rest on
the bottom of your library in a random order.