» Fri Aug 24, 2012 8:18 am
Repeatedly hitting both at once does the dual chopping attack, the speed of this attack is the same as the weapon in the left hand. In theory, putting a dagger in your left hand and powerful mace (or sword for reach) in your right lets you both swing the dagger normally, and swing the sword or mace at the same rate as a dagger. Combine that with elemental fury as well for hilariously fast mace spam.
Otherwise, it's useful for using your right hand as a normal weapon, then using your left as, for example, a soul trap or for paralysis.