I just found my second puzzle room. The first wasn't too bad, but I'm not having a lot of luck with this second one.
The problem is mainly a 4x26 grid of balls. The only spell I found that can flip the inner rows of balls is Energy Pulse, which flips everything in its path. But when the two inner balls aren't the same color, it's a nightmare to try to flip just one of them without the other and without wrecking all the ones you've already got. The energy pulse is wide and even just being slightly off on the aim, and it will catch the adjacent balls as well, messing up all your work.
Does anyone have any tips/tricks or know any better spells to use?