The Morrigan, Mistress of War

When the Morrigan, Mistress of War enters the
battlefield, attacks, or is destroyed, choose one:
• Each opponent sacrifices a creature they
control
• Each opponent discards a card. If they can't,
or if the card discarded was a creature card, you
gain 2 life.
• Return target card from you graveyard with
converted mana cost 3 or less.