211 Vol3 Ch11: Then let me tell you

This human-faced green snake was Isrig.

All those years ago, while he was attending school at the Academic Capital, he wandered into a certain great library.

There, he obtained the Book of Snakes.

The book detailed the Ritual of the snakes, which allowed the transmutation of humans into demi-human snakes, to which he was initially uninterested in.

However, as he returned to Lohr and lived his life, he slowly became tired and lost.

Just as he said, living a monotonous life of a thousand repeats singing a single tune, he couldn't find the meaning of his life.

So, he began to study the Book of Snakes that he had buried away in his collection and started to experiment with the Ritual of the snakes within it.