The rain of blood indicates the birth of the devil.
The seal a hundred years ago was broken, but she walked out of the seal with only half her soul and one-third of her magic power. In order to take revenge, she re-entered the academy, retrieved the other half of her soul, and gathered all her magic power.
Reincarnation begins, and after all we can't escape the joke of fate, and we meet again.
In the end, it was discovered that everything was a conspiracy.
This article is a slow-burn type.