Well now, what have we here?
The rune system of magic is fun, and using it more effectively is intergral to the game. If you draw certain things, a spell might occur. However, sometimes the game has trouble distinguishing between runes. The RTS style is fitting, and the monster capture system is well done, but the game has a nasty tendency to lag just when it shouldn't. It's challenging to have to rely on a small amount of magic that regenerates at a slow pace, and this forces you to rely on your monsters.
However, even though the game may not seem long, you will definittely spend massive amounts of time leveling up to meet the next chalenge. however, the story (ANOTHER young kid gets forced to save the world from an evil, or misguided, source of trouble) is wonderfully done. This game is absurdly difficult, though, so patience is required. The timed missions don't make life any easier.
All in all, this is a great game on the go, and a lovely gem on a system that has so much crap on it. If you have patience, the game could be the greatest experience currently available on the DS.