I am on Goal 9. I got 1 Hammer 2 levels ago when I read in the Forum that they were dropping early. Then they stopped dropping completely. Now I am collecting for Goal 9. Goal 9 requires 24 Hammers. Since Hammers are not a guaranteed drop, this will be very slow going. I don't know if they drop in multiples, but I am praying that they do (they probably don't). Not looking good so far. Will keep you posted. By the way, I have 2 mines.