Prismatic (3.5e Equipment)
From D&D Wiki
Prismatic: Upon command, a prismatic weapon glimmers with a multicolored light. The light does not harm the wielder. The effect remains until another command is given. A prismatic weapon deals an extra 1 point of acid damage, 1 point of cold damage, 1 point of electricity damage, 1 point of fire damage and 1 point of sonic damage on a successful hit. Bows, crossbows, and slings so crafted bestow the energy upon their ammunition.