1: Two Books
Quest that must be fulfilled to change occupation to Shillien Oracle. Magister Sidra explains that to become a Shilien Oracle you must acquire two books written in ancient rune: the 'Garmiel book' and the 'Andariel book'. First you must visit Magister Talbot in the Village of Gludin, and learn how to obtain the Garmiel book.
2: Bloody Runes
Magister Talbot asks you to slay Dark Succubi and bring back five bloody runes. You will find those abominations in a spider nest west of the Altar of Rites. In return he will compile the Garmiel Book for you. Monsters to hunt: Dark Succubi.
3: Return to Talbot
You have collected all five bloody runes. Return to Magister Talbot in Gludin Village and ask him to make the Garmiel Book for you.
4: Another Book
You have obtained the Garmiel book from Magister Talbot. Now you must obtain the Andariel book from Priest Adonius at Einhasad Temple in Gludin Village.
5: Ritual of Atonement?
Priest Adonius promises you that if you slay the skeletons and zombies in the Ruins of Despair and bring back 10 Ashen Bones, he will give you a copy of the Andariel book. You should hunt Skeleton Infantrymen, Shield Skeletons, Zombie Soldiers and Zombie Warriors.
6: Return to Adonius
You have collected 10 Ashen Bones. Return to Priest Adonius at Einhasad Temple in Gludin Village and receive a copy of the Andariel book.
7: Shillien Oracle
You have obtained the Andariel Book from Priest Adonius. Return to Magister Sidra.