City of the Dead

As City of the Dead comes into play, you may pay
2 life. If you don't, City of the Dead comes into play tapped.
{t}: add {u} or {b} to you mana pool.
{1}{u}{b}, {t}: Target player reveals his hand. You choose a nonland card from it. that player discards that card. Use this ability only any time you could cast a sorcery.