The process Viserys (and presumably Vizian) went through to become a lich was a ritual involving the following items:
- Violet Ice Crystals, from Vernia
- Scabre of Blackrot, which Viserys cheated from Graz'zt and Herot
- Demon blood, which Viserys got somehow
- Toran Grath, from the Bonecleaver Islands
- A Sacrifice, in the form of a kobold
- Mind Flayer brains, found in Val Kormin
All items (3)