I've been through IA13 a few times now. There's a lot of repetition from the past, of course. Nothing new in the way of Daemon engines, a new tank, new(?) land raider pattern. The biggie is the Lost and the Damned AssMill faction, though for competitive play, it ain't that big. You can find a comprehensive review of the units on many longblogging sites you already know about. Today, I'm just going to talk about the game-changers. These are the units that might make it into your army list if you're bringing the cheese.