Death Knight
The Death Knights were once dragon cultists in the personal guard of Godwyn the Golden. When Godwyn became the Prince of Death, they kept serving him, and they came to the Land of Shadow looking for a body for their lord.
There are two of them. The one in the Fog Rift Catacombs wields twin axes, and the one in the Scorpion River Catacombs wields a longhaft axe. Both use dragon cult lightning incantations.
Part of the Shadow of the Erdtree expansion, in the Land of Shadow.
Drops
Death Knight’s Longhaft Axe (Scorpion River Catacombs)
Weaknesses
The head takes extra damage
Resistances & immunities
How to beat it
The Death Knights mix axe combos with golden lightning. Stay close, block or dodge their swings and punish the recovery. They can be parried and backstabbed, which makes them good targets for a patient, defensive build.
Lore
A third Death Knight lies dead near a ledge in the Darklight Catacombs, and you can loot his full armour set.