Andy MacDonald is one of those few artists that you can always count on at conventions to draw an incredible sketch. I don't think I've ever seen any commissions that Andy has done that I haven't been impressed with. This sketch of Sin is no exception. I love the action and detail he put into it. I don't have many sketches of Sin and this is definitely one of my favorites. Andy is currently drawing the new Terminator series from Dark Horse. Check it out! And see more of Andy's work at http://www.andymech.blogspot.com/ .