We've probably all seen the 300 troop attack YouTube videos. Would be so cool to have the ability to just play around with some of the things devs get to do. No ability to actually use the mode in real-time attacks/defense; just an "offline" fun way to explore CoC. Perhaps in dev mode, you're limited to your TH abilities. So if I'm at TH8, I can only create a base or attack with whatever is available up to that level. Unlimited defense, walls, traps, etc. that you can then attack with unlimited troops. Sounds like hours of fun, no?