Katana

The katana is a weapon sold by the Traveling Merchant. Considering he can spawn very early game, and the fact that the katana has very good stats for an early game sword, it can be useful for a while (until the player gets a Muramasa). Including the fact that the katana has autoswing, it can be extremely useful against the Eater of Worlds. This weapon has extremely high base crit chance of 19% compared to other swords 4% which further adds to its effectivness

Trivia

 * It's appearance is a possible reference to the movie Kill Bill