No time for small talk, <name>. I was on what was to be a suicide mission to take this ziggurat. I've accomplished my duty as a soldier, now is the time to get some answers.
This lich has knowledge I seek, yet I cannot inflict pain to his physical body to obtain that knowledge.
The lich stored his soul in a phylactery, and while it remains hidden, I won't be able to pry the information from him.
Return to the camp and take my horse, Dusk, she will lead you to the phylactery. Bring it to me.
You're back, <name>. Did you get the phylactery?
Just in time, <name>. Pinning down a lich is not as easy as it looks.
Dusk will take you to the Frozen Phylactery. Loot it to spawn several Drowned Guardians and a Phylactery Guardian, the latter of whom drops . It is in the water at the bottom, right in front of where Dusk takes you.