Chapter 601: Eerie Attacks

There was an indescribable silence and sense of concealment in the room.

By opening the entrance gate of the Forgotten World searched for in the Book of Truth, this book that recorded Grimm's endless failures could be regarded as a real tool, otherwise it was just a common experiment note.

At the beginning, the predecessor of the Book of Truth, the Book of Isotta, could easily open the spiritual Spectral World in the Tower of Ruins. It could also seal real-world creatures into the spiritual world that he simulated himself, thus forming a Spacetime Seal and gaining incredible power.

With the fall of Black Isotta Stigmata Sorcerer, the book of unknown material gradually disappeared and became the predecessor of the Book of Truth in Grimm's hands.

"Come on, Curse of the Medium World!"