Shatterspike

This intimidating weapon appears to be a longsword with multiple hooks, barbs, and serrations along the blade, excellent for catching and sundering a foe's weapon. Wielders without the Improved Sunder feat use a shatterspike as a +1 longsword only. Wielders with the Improved Sunder feat instead use shatterspike as a +4 longsword when attempting to sunder an opponent's weapon. Shatterspike can damage weapons with an enhancement bonus of +4 or lower.