 The potion invariably kills the drinker but if the process is successful it rises again some days later as an undead Lich.Occasionally, this metamorphosis occurs by accident as a result of life-prolonging magic.Unlike most other forms of undead creatures, the Lich retains all of the memories, personality, and abilities that it possessed in life — but it has a virtual eternity to hone its skills and inevitably becomes very powerful.