Wosy Crot, Cackling Keep

Haste
{b}{r}, {t}: Flip a coin. If you win the flip, each opponent loses 2 life and you gain 2 life.
Whenever you win a coin flip, untap Wosy Crot, Cackling Keep. Then, if this is the third coin flip
you've won in a row, transform him.
"Don't test your luck there, buddy..."