Autumn Moon

When Autumn Moon enters the battlefield, add {g}{r}{b} to your mana pool.
At the beginning of your upkeep, choose one:
Look at the top 4 cards of you library, choose a creature card, reveal it and put it into your hand. Put the rest on the bottom of your library; or Autumn Moon deals 2 damage to target creature or player; or draw a card and you lose 2 life.