Yaphyll Zulkir of Divination

Yaphyll was a ruthless and cruel Mulan woman who served as the Zulkir of Divination for over a hundred years until her death while performing a powerful ritual at Szass Tam's command. Despite her previous opposition to Szass Tam's rule, he saw her mastery of divination magic as a valuable asset and desired to raise her from the dead. However, the ritual that killed her bound her with a fragment of the Spellplague and Szass Tam was unable to resurrect her. To his surprise, she emerged from her tomb after Valindra Shadowmantle returned from Chult. The reason for this is unclear, but it has caught Szass Tam's attention.
Yaphyll is not undead, but she appears to be frozen in her early forties. Despite his efforts, Szass Tam is unable to use telepathy or divination magic to spy on her, much to her delight.