Morkuldin is a craftable set. When you deal damage with a Light or Heavy Attack, you have a 10% chance to summon an animated weapon to attack your enemies for 15 seconds. The animated weapon's basic attacks deal 4551 Physical Damage.
Morkuldin is part of the Orsinium DLC. The crafting station is located in Wrothgar (Morkuldin Forge). You can craft any armor, weapon or jewelry of this set in any motif style you know, as long as you have 9 traits researched (per item). You can trade crafted pieces to other players. Each set item becomes bound on equip.