I have two suggestions to improve the MC.
First : replace the actual circle, which is limited in half of playground, by a colored circle which gonna be blue/green when you are targetting a card withing the authoried zone, and red when you're targeting a card in your opponent side. This way, people won't be able to "hide" cards in the middle of other card to protect it from a MC.
Second : accelerate the animation to have something as fast as the mystic counter.