Seeking an ancient novel that is cruel to the heart, indulges in beauty, and is accepted by people who teach magic, and seems to be a soldier.

Phantom of the Opera is a bit like it, but it doesn't seem to use poison. It is because a friend (also taught by the devil) will use poison or something. In addition, there seems to be no poisonous fog scene, and there is no Bai Lianhua or anything. But one attack seems to have absorbed some skills, and it is possessed. In order to save the attack, it absorbed the attack skills.