Reminder: there are lots of cooler and more fitting terms for the object a lich keeps its soul in than phylactery (which is the Greek-derived English name for a Jewish ritual object which has nothing to do with souls, magic, or necromancy).
Instead try:
vampirism as a metaphor for queerness. hunger as a metaphor for repressed desire. immortality as an expression of profound loneliness.
Mao Zedong’s Little Red Book
Xi Jinping’s Little Red Note