Lando Calrissian, Gambler

When Lando Calrissian, Gambler attacks, flip a
coin. On heads, you gain 1 for each attacking creature you control. On heads, you lose 1 life for each attacking creature you control. You may exert him. If you do, flip another coin. On heads, you
gain 2 for each attacking creature you control and draw a card. On heads, you lose 2 life for each attacking creature you control and discard a card.