Berserker's Soul

This enchantment can only enchant a creature with base power of 5 or less.
{7}{t}: Put your hand into the graveyard. Draw up to 7 cards. When you draw your first non-creature card, Stop drawing cards, and show your hand. Discard all creature cards to the graveyard. The creature that was enchanted can attack one more time for each creature sent to the graveyard.
You can only do Berserker's Soul once per turn.