Tombs of the Tisrocs

Tombs of the Tisrocs enters the battlefield
tapped unless you control the fewest lands.
{t}: Add {w} or {b}.
{w/b}, {t}: Exile target creature in a graveyard with
a tomb counter.
{t}: You may cast an exiled card with a tomb
counter. Activate this ability any time you could
cast a sorcery.