Substitu! Evil Spirit!! (3)

However, Levi knew why he did not grasp the mystery behind it.

"Because the secret skill of evil spirit lingering had already gone beyond the realm of physical cultivation for knights. To condense the black gas into such a precise and obedient incarnation, knights needed extremely powerful spiritual energy to control it!"

"In other words, the possession of evil spirit lingering is a product of the combination of physical and spiritual cultivation."

Levi was a practitioner of seals and had done some research on wizards. He immediately found the problem.

"Therefore, if I cultivated a Meditation Art and strengthened my spiritual force, it should have been very easy for me to master the secret technique of evil spirit lingering."

"The cultivation of spiritual force is also crucial, especially when facing enemies like wizards."