Poisons the enemy starting at 2 hp per turn.
Since these are dropped only by Assassins and the archdemonAnnihilon, they're considered semi-rare. The Viper Star isn't a super effective weapon (much like the rather weak poison arrow). It does less damage than a regular star, and the additional earth damage is just too feeble. It looks nice for decorative purposes. Tests show this weapon has a 9% breakage.