Lich It or Not

When you acquire this, you become Undead,
and you may upgrade one of the Glass Bells.
Complete the quest "The Spirit Is Willing...".
Restore your maximum Health. You no longer
pass out from having 0 or less Health. If you
would take physical damage while at 0 or less
Health, you instead lose 1 Sanity.
Your Phylactery must never be destroyed.