Sister Serafina has a plaything that she has grown tired of, but is too fond of to dispatch on her own. Sister Nessus has asked that we slay it. In return, we'll get access to the Covenant of Seven Sisters libraries and can keep anything we find in that Wing of the Covenant.
Their libraries should hold answers on where to find The Cup and Talisman of Al-Akbar
Traveling through the Western wing of the Convent, the party navigated their way through a series of trials and puzzles to the den of Ishaq where he viscously attacked. No match for their might, the Society of the Silver Chain slay the madman and gave him a proper cremation ceremony to pass on.
In reward, Sister Nessus gave access to the libraries, were we discovered considerable knowledge about the Sultanah Shakiza-el-Azwar, Casbah of Khaibar, El-Waifu, the Sightless One, and the old God, J'Al'Ardin.
She also gave additional information on The Cup and Talisman of the Rightful Sultan of Khaibar. While she suspects one may be in the Under-Tomb, she doubts both would be kept in the same location. She presumes the location of the second object, or at least hints to it, would be held in the Sultan's palace.
With their business settled, the Society left the Covenant and began their journey through the desert to Khaibar.