Though the POTION MASTER delved naught into the dark path of immortality himself, his work did contribute to more than one aspiring lich. After his death of course.
To unbind the immortal soul from the fragile flesh is no SIMPLE THING. When you scry the looking glass what do you see? I only see FUTURE ROT and WORM FOOD! Wonderful! Drums! It is time for drums!
There are many paths to lichdom, some MORE SUBTLE than others. Some think they need but learn one ultimate spell. FOOLS! The keen minded know there is great power in the alchemical arts. Let me tell you one such tale.
Bones! HAHA Are we not but sentient MEAT hung upon ROCK that is grown! Living ROCK grown by yet smaller meat, the motes of life, the cells. Bones? Vile! Hilarious!