Death's Oath is a unique Astral Plate. he Death Aura skill granted by Death's Oath is affected by any relevant support gem that is also socketed in Death's Oath. It does not require the socket to be linked. Since the skill is granted by the item rather than a skill gem, it is not affected by Empower Support, Enlighten Support, or Enhance Support. As a red (strength) gem socket is not the desired colour for a Death Aura build, and because Death's Oath has a high strength requirement, it is recommended to use a Crafting Bench and the add-socket / remove-socket method to recolour the socket of this item.