Slim Shadow

Deathtouch, Ward-mill a card.

{t}: Add {b} to your mana pool.

Whenever your opponent mill a card, you may flip
a coin. If you win the flip, you gain 2 life. If you lose the flip, you lose 2 life. This ability triggers twice each turn.
{b}{b}{b}: Return Slim Shadow from your graveyard onto the battlefield.