Alien Invasion: Give Me Some Blood

[No system, single female protagonist, semi-group portrait, high martial arts, slow heat, new "spiritual" setting] A hundred years ago, the "Gate to the Spirit World" opened simultaneously around the world, and invisible and insubstantial spirits poured into the human world. Human weapons were completely ineffective against spirits, and cities fell one after another. The foreign spirit takes over the human body by "entering the soul". The person who has been taken away from the body appears as normal, but is already a puppet of the spirit on the inside. Today, 70% of the world's population has been controlled by alien spirits. They secretly transform the world in human bodies - building spiritual energy towers, laying out spiritual vein networks, and transforming cities into "spiritual realms" suitable for the survival of spiritual bodies. Humanity retreated to the last twelve "Holy Light Fortresses" and lived under the eyes of the alien spirits. I don't know who is the "human" and who is the "spirit" around me.