Compendium Imortale Magica Malifica

Imortale Magica Malifica is an ancient Sueloise book that contains three processes for becoming a lich: one for wizards, one for priests, and one for bards. It was last located in the Secret Library of Vecna.

Discrepancies

This book was created for Second Edition, where these three were the only major types of spellcasters. With the addition of sorcerers and separation of druids in 3E, it is up to the DM as to whether rituals work for them as well.

References

June 2000 Article from Dragon Magazine #272. Author: Steve Miller