Simple and fair nerf idea for the spirit.
Here is a simple and fair idea to change the spirits power to have a little counterplay.
You know how the girl has broken glass all over there body? Here is a simple idea, when the spirit moves in her phase these give a little sparkle from them. Something like the little visability wraith. When you have now eyes you can see a bit where the spirit is moving or can simply lose the sparkle out of sight then your just bad