This guide will let you know where to Get LEGENDARY Assassin Poison One-Handed Sword called Joyeuse in Assassin’s Creed Valhalla.
To get the sword, you will need to find three special keys.
For the first key, you have to go to the middle of Melunos, jump into the water, and you will see water save. You will need to swim through and then loot the mystery from there.
For the second key, you have to go to the left side of the map in Evresin. Research underground, and you will find the second key, as shown in the map below.
To find the third key, you will need to go to the top right side of the map in Amienois. You have to find and grab the third key when you get there, as shown in the image below.
After getting the keys, make your way to the southwest side of Paris, as shown in the image below.
When you get there, you have to enter through the entrance and then explore the cave. You will find the chest there, which you have to loot and get Joyeuse.
The effect of this sword is that it will poison your weapon after successful heavy hits to the enemy, as shown in the image below.