Requires OBSE v0017+
Willpower now affects a character's vulnerability to the effects of magic, as was the case in previous Elder Scrolls games. At a Willpower of 50 there is no effect, but higher values apply Resistance and lower values apply Weakness. This effect applies to all NPCs as well as the player.
With default settings you receive 1% Weakness to Magic per point of Willpower below 50, and 0.24% Resistance to Magic per point above 50. The rate at which Weakness and Resistance is applied, as well as the threshold value, are configurable.
Version 4 resolves several issues and includes a clean-removal mode which can also fix some problems created by previous versions.