Quixote's Sacrifice

Whenever an opponent's effect causes you to mill one or more cards, you may pay life up to the number of cards being milled. For every life paid in this mana, return a card from your graveyard to your hand.
Madness {1}{b} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)