Oblivion's Foe is a craftable set available in all armor types. The 5-piece set bonus increases the damage of your Soul Trap abilities by 100%.
Oblivion's Foe is part of the base game. The crafting station is located in Coldharbour (Font of Schemes). You can craft any armor, weapon or jewelry of this set in any motif style you know, as long as you have 8 traits researched (per item). You can trade crafted pieces to other players. Each set item becomes bound on equip.