The fourth stage was called the Mental Forcefield.
Compared to the names of the previous three stages, the fourth stage was much more normal.
The Mental Forcefield was essentially similar to the mental pressure Wang Che gave the little caterpillar and the Magnetic Sword.
The difference was that this Mental Forcefield had more than double the gravity. It would create an enormous pressure on the soul pet's body and mind.
In fact, the fourth and fifth stages were connected.
The Mental Forcefield of the fourth round came from a guardian soul pet in the fifth round.
Soul King, the Soul Locking Ghost's third stage evolution that was an extremely powerful soul pet.
The Mental Forcefield of the fourth round was cast by this Soul King.
The range was huge, about the size of a football field.
To pass this round, one needed true strength.
