Legendary Small Katana Achievement in Stranger of Sword City
Legendary Small Katana
10You have obtained Small Muramasa.
How to unlock Legendary Small Katana
This achievement, as well as "Legendary Magical Katana" and "Disgusting Cursed Katana", can be obtained in the post-game dungeon from Gold Katana chests. Just keep trying to get these chests and you'll eventually find this weapon. Since it's a unique weapon it'll be listed as a "Rare Dagger" before you identify it.