That thing is pretty cool. It's complicated and simple at the same time, and seems to focus mostly on grabbing higher bonuses and action management to get the edge over your opponents. One extremely important thing I'm confused about though: sometimes it sounds like you can copy a spell and then cast it, other times it doesn't. More examples would be good, maybe even a mixed combat round by round, and what the mimic might do in such a situation. I feel the class would be easy to use once you knew exactly what it could and couldn't do, but it's a little hard to figure out just from the words. Seriously cool though.