Fix for the difficulty of the first mission

Stones Keeper: Prologue

Control your own flying castle. Take part in the campaign for the Order of the Screaming Griffin against the forces of the undead that have invaded your provinces. Try to penetrate the secrets of the world around you.

Since new players were having difficulties with the first fight, we decided to weaken the banshee by removing her additional evasion ability in this mission. Hopefully this will give more time and opportunity for players to adapt to the controls.