43b78d2c_Spells__T2____Torchlight_Wiki__Effects
[Tome] Willpower IV [Description] Training that provides a resistance to slowing and immobiling effects. Only one rank of Willpower may be equipped at a time. [Required level] 46 [Effects] 
40% Slow Resistance 40% Immobilization Resistance.
Spells (T2) - Torchlight Wiki
Effects