Necromantic arcane circle
Magus Khun searches through the library within the Thayan enclave for any necromantic ritual circles similar to those found on the floor of the Ecclestian hold. Of particular interest is the purpose of such a ritual.
The Magus find many old books referencing to similar rituals which allows undead to summon more of their kind using an age old ritual, it appears to be fuelled by the blood of priests and priestesses to create the ritual runes. A practise banned from Cormyr and many other nations long ago, but most effective and very popular amongst necromancers who leave their enclaves for a length of time. Allowing the undead to summon more guardians when needed, without the need of the Master's arcane powers. Removal or cleansing of the "holy body", will end the rise of the dead.