This is also why Anastasia, the Holy Maiden of the Dark Church, gave up looking for a body. A contaminated body, with its essence of life irreversibly altered, is useless even if found.
Similarly, as she lost her essence of life, Anastasia's thinking has always been particularly torturous. Her balance was broken, and she survived solely on the divine power of the three God-chosen Knights.
Nature, the Sun, and Moonlight recreated a new shell for her, barely restoring the missing essence of life.
But artificial essence of life, being external, can never replace one's own, no matter how good it is. Therefore, Anastasia could only linger on, unable to move forward, and due to its artificiality, her thoughts grew weary and weak, lacking peaceful balance for rest.
"The process of promotion is very simple when spoken of, just dismantle the 'God' in the silver cross and merge it separately into empty, I, standby, empty, I, achieve the balance of the three, and you are a Golden Mage."