Berserker Soul

When Berserker Soul is cast discard all cards in
your hand. Target creature you control with 4 or
less power deals damage equal to its power to
target opponent, then you draw a card and reveal
it. If the card you draw is a land or a creature
with 4 or less power, you may repeat this process.
You lose the game during your next end step.
Exile Beserker Soul.
Limited 1