Sword of darkness, pulled from its stone scabbard at an altar.

From the quick of the root, wandering coils of darkness coalesce and release, their eddies and vortices giving form to the dark blade.

Unique Skill: Darkness (30 FP)

Raise the sword aloft and cleave surroundings with darkness. Deals magic damage and temporarily reduces magic damage negation.

How to Obtain

The Sword of Darkness has to be converted from the Stone-Sheathed Sword or the Sword of Light at a specific location depending on where the Stone-Sheathed Sword was picked up.

If the Stone-Sheathed Sword has been picked up at either the Ruins of Unte or the Ancient Ruins of Rauh, the altar to convert it will be at:

Gravesite Plains - Found in front of an altar in the deeper parts of the Fog Rift Catacombs. To access, descend into the catacombs, until you reach a room with three trapped ceilings. Make your way to the end of the room and jump unto the contraption and ride up. From this point you can walk across to reach the altar.

If the Stone-Sheathed Sword has been picked up at the Fog Rift Catacombs, the altar to convert it will be at:

Ruins of Unte - Found in front of an altar in the blocked courtyard of the Ruins of Unte. You need to wake up the Furnace Golem blocking the way to the church access the item. To do this, throw one of the large fire pots at it's face from a higher point.

Ancient Ruins of Rauh - Found in front of an altar. To access this area travel Northwest from the Rauh Ancient Ruins, West site of grace and enter the temple. Travel through the scarlet rot area while keeping northwest. After exiting the ruins you can see the tower ahead which can be easily accessed by an invisible, straight bridge. The altar is on top of said tower.

Notes

For detailed weapon stats you can visit Elden Ring Weapon Calculator