Meowmere

The  is the weapon with the highest base damage in the game. When used, it fires a Nyan Cat-esque projectile in an arcing trajectory. It bounces four times before disappearing.

Trivia

 * The projectiles fired when using this weapon seem to be inspired by the Nyan Cat internet meme.
 * The base design of the sword is reminiscent of the Palladium Sword.