By Alejandro Melchor, for the Nahual tribe.
This is a gruesome ritual performed mostly on Kindred; by drinking the blood of a person, the Nahual learns a fraction of the "doner"'s knowledge and powers for a day. Use the total Blood Points to get the percentage. The Nahual can then transcribe or practice the knowledge gained so that he might replicate it later. This was how the Nahual learned Necromancy and Thaumaturgy.