Classic of Mountains and Seas

After an accident, the protagonist Yi Hui inexplicably has a book in his mind, called the Book of Mountains and Seas. This book can not only summon ancient beasts to fight for the protagonist, but also allows the protagonist to travel back and forth between ancient times and reality at will, so as to obtain various precious cultivation resources. From then on, the protagonist's cultivation seems to be cheating, and the enemies will kill him at will. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.