Glaive

The Glaive is a Pre-Hardmode rogue boomerang sold by the Bandit for, and it can be stacked up to three times. The amount of boomerangs thrown is dependent on stack size. Each boomerang will return to the player after hitting four enemies or traveling a certain distance.

Performing a stealth strike with the Glaive will cause the next boomerang thrown to travel 80% faster and not bounce off of enemies.

Trivia

 * This item may be a reference to the Bloons Tower Defense game series, in which Boomerang Monkeys can be upgraded to instead throw glaives with greater piercing ability.
 * This in turn was likely a reference to the movie Krull, which popularized the depiction of glaives as five-pointed bladed thrown weapons, despite historical glaives being polearms.