Turrim In Umbra

When Turrim In Umbra enters the battlefield
tapped unless you sacrifice a creature.
{t}: Add {b} to your mana pool.
{1}{b}{b}: Until end of turn, Turrim In Umbra
becomes a 3/3 black Shade with shadow. It's still
a land.
Just because you can't see her doesn't mean she can't
see you.