Tasigur, The Grave Storm

{2}{b}{g/u}: Put a +1/+1 counter on Tasigur. Then put the top 3 cards of your library into your graveyard. Choose an instant or sorcery in your graveyard with CMC less than or equal to Tasigur's power. Copy it. If it was put into the graveyard this turn copy it twice, instead. You may cost the copies for free