A war orphan who survived the battlefield between immortals and demons was born with a "purifying spirit body" that can purify all things. In order to survive, and to repay the kindness of saving my life, I was sent as a "humanoid weapon" to Gu Lin, the God of War of the Three Realms, to heal him of the immortal curse left by suppressing the ancient demon lord. He is cold, powerful, and the god who protects the three realms, but he is only as cold as ice to me and regards me as a useful tool. From a first-person perspective, I tell how I, from a humble "Yaoyin", relied on my unique healing and purification abilities to gain a foothold in the Iron-Blooded Military Camp and become his invincible solid backing. From suspicion to trust, from use to love, we gradually uncovered the truth of the war and the huge conspiracy hidden in the heaven. In the end, I was no longer someone's vassal, but stood side by side with him, becoming the strongest partner in protecting the Three Realms.
