Der eisendrache from design point of view rather simple map with loads of fanservice hidden within. Overall I enjoy the map one of the finest pieces of content from Treyarch full of detail and fun to play.   Map simple to play hard to master, does have some little hidden items within it. Lesser skilled players can play the map without much trouble but takes master to learn it.

Some random elements within the map but they do have a pattern for example.  Wolf bow quest line paintings have story behind them and order.   Void bow has series of random icons given to various names.

Easter egg is masterpiece in fan service with complex quest ahead for any player.  Looking forward to completing it but finding people to do it <_<