Captivating Sitri

Sitri's found in the Boundaries of Solomon in the Corrupted Maze of Incubus. She drops a very major upgrade for accessories ( Wirinom's Rival, Sorrow of War, Gremorie's Precious Necklace). Granted this upgrade has an inconsistent drop rate and costs 400k Gold to create. As for mechanics she has a magic nuke that slows movement speed.

Drops:

Lemegaton

Enchanted Robe

Grimoire of Spirituality - Aura of Affection