There are many weapons in Dark Souls 3 that can be used for dark infusion. Some of the best weapons for dark infusion include the Greatsword of Artorias, the Black Knight Sword, and the Moonlight Greatsword. The Greatsword of Artorias is a great weapon for dark infusion because it has high base damage and scaling. The Black Knight Sword also has high base damage and scaling, as well as a strong attack that can deal significant damage to bosses. The Moonlight Greatsword is a unique weapon that has high base damage and scaling, as well as a powerful attack that can deal massive damage to enemies. All of these weapons are great choices for dark infusion because they have high base damage and scaling, as well as powerful attacks that can deal significant damage to enemies. Additionally, all of these weapons have low weight values, which makes them easy to use for long periods of time. ..