Nightglow

The Nightglow is a Hardmode, post-Plantera Magic weapon dropped by the Empress of Light. When fired, four rainbow crystals emerge from the player and home in on nearby enemies. Each of the rainbow crystals can pierce enemies and hit multiple times, resulting in high potential damage. However, since they spawn in random directions from the player and are destroyed if they collide with obstacles, it can be difficult to use this weapon in enclosed spaces.