BUILD YOUR OWN KRAKEN A.M.S. CASE: Kraken A.M.S. Exoskeleton case, when combined with Perseus A.M.S. case, transforms to a heavy-duty Kraken A.M.S. case. Represent your favorite sports team, show your school spirit or just choose a different color for each day of the week. With more than 50 different color combinations, it is easy to give the Kraken A.M.S. case a personal look and feel.