Château d'If

Chateau d'If enters the battlefield tapped.
When Chateau d'If enters the battlefield, sacrifice it unless you exile target nontoken creature you control.
{t}: Add {b}{b}{b} to your mana pool
{3}{b}{b}{t}: Exile target creature that dealt damage to you this turn.
Chateau d'If, the prison tower which no one has escaped alive from before.