Lilith, Lady of Lament

You may cast Lilith, Lady of Lament for {2} less, but its base power and toughness become 1/1
Sacrifice a black creature: Search your library for 3 Sorcery cards and reveal them to target player. Then that player randomly chooses one for you to cast without paying its mana cost, shuffle the other two cards back into your library. Activate this ability only once per turn.