Casting Bones - same as that used by witch doctors.
This powerful magic item was created to augment Alienists, a prestige class in the Tome and Blood.
Circlet of Amplus Ater Iris meaning “Circlet of The Great Dark Messenger” (Amplus - great, important; Ater - dark, malicious; Iris - messenger of the gods. Thought by some to mean Nyarlathotep)
As a new member of a magical organization you get 1-3 magical scrolls to do with them whatever you want. They are unmarked and contain spells you dont know and will only find out at the moment of reading=casting.