Drain Courage

This Magical Power targets one enemy model in range.
The target immediately worsens their Courage
value by 1 for the remainder of the game;
so a model with a Courage of 5+ that is affected by this would then have a Courage of 6+.
A model can be affected by this Magical Power multiple times over the course of the battle, worsening its courage value each time.
If the target is a Cavalry model, the caster must choose between rider or mount.