Shaitanic vambraces or Sartanic vambraces, named for the God of Evil are rare artefacts which have been up for auction and sold in 541, 634, and 731 AF. The cruel bloodsteel vambraces are said to have been forged in the depths of the Inferno, countless daemons sacrificing themselves to infuse them with the power to reduce the essence cost of any Necromancy ability by 50%. They have been won by Firey and Alrena respectively.
They can be purchased for 1200 credits though they may difficult to find in any artefact shop in Delos.