Two-handed exotic weapon. 2d6 damage. Crit x3. 5 lbs. 200 gp.
Though freakish-looking, the shredsword is not designed for actual combat, but to focus destructive arcane energy. A user proficient with and holding this weapon takes a -2 penalty on attacks but gains +1 caster level when casting spells with a variable amount of damage dice based on level.
Another in the strange series of weapons appearing on this site which are nonmagical themselves, but are shaped in such a way that they aid magical energy. Enjoy a method of increasing your blasts at the cost of a feat and a strange weapon.