Enchanted Sword (item)

Enchanted Sword is a melee weapon found by breaking a background item (appears as the hilt of a sword protruding from rock) found at the cavern level. When used it will both perform a sword swing and fire a projectile at the current cursor location. Both the sword swing and the projectile do damage and generate light, making this a useful weapon for exploration. The Beam Sword seems to be a stronger version of this weapon.

There are 2 different background objects that look similar but only one of them will drop the sword.





Trivia
The sword may be a reference to The Legend of Zelda-A Link to the past, as in this game the Master Sword could fire beams and during finding it there were false copies.

this may also be a reference to the lengend of excalibur and the knights of the round table