I wouldn't suggest bothering to work on this until you've gotten all of the other achievements, but if you somehow manage to finish the game and all the bonus levels without getting this one, level 42 (Faun level 2) in the story is awesome for it. As soon as you start the level, two arrows will shoot out 8 pieces of ice and 8 pieces of stone automatically. Just hit restart until you get the achievement. Also a good place to work on
, letting you kill two birds with one stone. Pun totally intended. HAH!