Polarities Mod/Laser Cutter

The Laser Cutter is a Hardmode melee weapon that drops from the Sun Pixie. When swung, it creates a laser beam with infinite range that pierces through terrain, hitting all enemies in its path. Unlike typical swords, it is swung in a more aimable manner that covers a cone-shaped range in the direction of the player's cursor. Its Eclipxie counterpart is the Blacklight.

Trivia

 * Its tooltip is a reference to the XKCD webcomic.