There is a glitch with Rook's shield spell when the damage from it still remains after the spell itself ended. It is a pretty major damage if you can scale the spell's damage(fury for example) So I decided to ban this skill, please do not use it, even better to take some other skill. I will add this ban to the rules as well.

This is how the glitch looks (you can see that damage from the spell still exist even after the end of it)