Double or Nothing

You gain 2 life, then flip a coin. If you win, you
gain life equal to the amount of life you've gained
this turn, then you may repeat this process. If you
lose, you lose life equal to the amount of life
you've gained this turn.
Gamblers often get the feeling that the gods are
blessing their every toss. They usually fail to wonder whether it's the god of luck or of trickery who's presence
they feel.