T1000

The T1000 is a craftable post-Moon Lord magic gun that is a direct upgrade to the Nano Purge. It works like the Laser Machinegun, firing slowly at first before accelerating to a higher maximum firing speed. However, it is much more powerful, spins up faster than its predecessors, and fires four rainbow-colored lasers per shot.

Trivia

 * This weapon is likely named after the T-1000, the robotic main antagonist of the film Terminator 2: Judgment Day.