Bismuth Mod/Narsil

The Narsil is a Pre-Hardmode dropped by the  with a 50% (1 in 2) chance. Upon hitting a projectile, it reflects it, with the text "Reflected!" appearing above the player.

Trivia

 * The name "Narsil" is a reference to a fabled sword wielded by king Elendil of Andúnië, from the Lord of the Rings, Unfinished Tales, and the Silmarillion, all by J.R.R. Tolkien.