Ahrima, The Wicked Warden

Discard Ahrima, The Wicked Warden: Search your library for a card named "Lair of Darkness", reveal it and add it to your hand.
{t}, Sacrifice 1 black creature: Draw 1 card.
{t}, Sacrifice 1 black creature other than this card: Search your library for a black creature with toughness 3 or greater, reveal it and add it to your hand.