Beam Sword

The Beam Sword is a very rare sword which deals 54 damage and also shoots a beam of light that looks like a sword. With the right equipment, its base damage can be as high as 79, making it quite powerful for how easy it is to obtain. It can be obtained by killing Armored Skeletons and Heavy Skeletons, which have a 0.67% chance of dropping it.

Trivia

 * Could be a reference to the master sword from legend of zelda, due to the ability to shoot a beam from the sword.