Spirits reaping revenge on the living is the story of a thousand old tales. What is even more mysterious is how the state of Eastern Wu, after ensnaring and killing Kuan Kung, sent his head to Ts'ao Ts'ao in a crate.
陰魂附身仇人以報仇，已經是千古奇談，更玄的是傳說東吳計害關公後，還將關公的頭顱裝在木匣中轉送給曹操。