Blade Dancer's zero circle or about one funny story

I’m not very good at spell gems. I use them quite rarely. I’m still trying to understand the damage system. But one spell I quite like it - Mind trick. I like to see how the enemy creatures are beating themselves. Until I met Blade dancers. You know their special - one is struck, the other two immediately hit the offender. huh. How fun it was when I cast Mind trick in one of them and started a chain of mutual beatings. until such time as the game is crushed. Zack! Make it works. Its a legal way!