My wife and i were addicted with Fantasy Defence, a tower defence-based game on iOS devices, developed by Korean Play Bean company. It's like Three-Kingdom, but the characters has a stunning graphics and they possess magic abilities as well.
It's price is only $0.99 so it won't cost much for all of us for this wonderful game. I hope you like this game as well once you tried to play it.
Here's the screenshot taken from AppStore: