Requirements and loadout
Dark Sword needs 16 Strength and 15 Dexterity to wield one-handed. It weighs 4.5 units. Check your equipped load before changing weapons so you keep the roll you expect.
Where to find it
Dropped by Darkwraiths, including those near the Farron Keep Perimeter bonfire.
Infusion and field notes
Useful infusion: Heavy / Dark / Chaos.
Its requirements exceed the base Pyromancer build on this site. Reallocate levels before choosing it as your caster sidearm.
Infusion and damage depend on your current attributes and the enemy's defenses. Compare the result in your own inventory before spending upgrade materials.