The Greensword of Arvon Til
This mystical blade was crafted deep in the heart of the Sylvan Realm many centuries ago. It was forged from metal taken from a strange green meteorite. The enchanting process and this metal gives the sword its powers. The Greensword is an elven longsword made of dark green metal. It is a two-edged weapon, with maple leaf designs etched into the hilt, crosspiece, and blade. A large emerald is set into the pommel. The weapon's name is woven between the leaf designs on the blade.
The Greensword is a longsword +2, bane of evil outsiders and undead. Whenever it is within fifty feet of undead or evil outsiders, the blade glows with brilliant green light equal to torchlight, and it gains +2 to its enchancement bonus and inflicts and extra 2d6 points of damage against such beings. All of the sword's abilities and properties remain intact when travelling through other planes.