Apothecary Cabinet

When Apothecary Cabinet enters the battlefield, exile the top three cards from your library face down.
{2}, Tap Apothecary Cabinet: You may cast a card exiled by Apothecary Cabinet. If you do, as an additional cost, pay one mana of that card's color. (Pay no additional mana if that card is colorless.)
In its drawers are the secrets of many generations.