Lazinator

The Lazinator is a craftable Hardmode magic gun. When used, it automatically rapidly fires a straight, gravity-defying purple or green laser projectile. Green lasers are very slightly shorter and slower than purple ones. Each lasers pierce up to two targets before disappearing on the third.

Trivia

 * The Lazinator's model and name are a reference to the Zapinator, which in turn is a reference to a light gun peripheral for the NES.
 * The Lazinator was implemented based on a community suggestion made by Gouvod on the mod's Terraria Forums post, where it was called "Zapper".