Terra Shiv

The Terra Shiv is a craftable Hardmode shortsword that autoswings. On each swing it will fire a shot that will pierce three times before stopping on the fourth enemy. The projectile only moves horizontally to the left or right.

Trivia

 * This weapon is the shortsword counterpart to the Terra Blade, and as such, everything in its crafting tree are shortsword equivalents of their Vanilla forms.