Eldrazi Forcefield

{t}: Add {b} to your mana pool.
When Eldrazi Forcefield enters the battlefield, your current life total becomes your starting life total.
When Eldrazi Forcefield enters the battlefield, each opponent loses life equal to your starting life
total. If you were to double your starting life total, shuffle your graveyard into your library. If you
were to triple your life total, you win the game.