Polarities Mod/Cosmic Discs

The Cosmic Discs is a Hardmode boomerang crafted by combining the and  at an Ancient Manipulator. It has the functionality of both weapons simultaneously, launching two celestial boomerangs that act normally initially but begin to home in on enemies when they would normally start to return; the Solarang orbits around foes and fires lasers from afar, while the Lunarang hovers over them and deals rapid melee hits. The Solarang and Lunarang inflict On Fire! and Frostburn, respectively. Like its components, right-clicking while the boomerangs are out will cause them to stop attacking and return to the player immediately.

It could be considered the counterpart of the, being an upgraded version of a weapon that drops from the boss and is only available later in the progression.