43b78d2c_Spells__T2____Torchlight_Wiki__Effects
[Tome] Dual Wielding V [Description] Improves damage of all weapons when dual wielding. Only one Dual Wielding spell may be equipped at a time. [Required level] 60 [Effects] 
30% Damage bonus when Dual Wielding
Spells (T2) - Torchlight Wiki
Effects