Soul or body?

Lan Zhan had never fully thought about it enough when he was younger, because he thought he wouldn't have to ever personally deal with it. His family had a clean record, no one in his ancestral line had ever died of the "Depletion Illness" as the cultivators had started to call it. He thought he would be free of the mental baggage and torture that came with someone close to you becoming a victim of. He thought the people he finally got to spend his life with would be safe. But apparently not.
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(Cover art is not mine)