The consumed spiritual power is no less than that used by the yellow jade Buddhist beads, and even surpasses them.
Besides being used against enemies, when the Evil Eyes are activated, Liou Yuan's eyes can clearly see the flow of star power around him.
Even the flow of spiritual power within cultivators' bodies.
This allows Liou Yuan to clearly see the specific cultivation level of those weaker than him or not much stronger.
Of course, it's ineffective against someone like Fang Yu, an Inner Sect Disciple. Liou Yuan has tried.
Perhaps because he is currently too weak.
Besides, there are side effects.
Once the Evil Eyes are activated, Liou Yuan's emotions unknowingly become restless, with an extreme desire to attack, finding fault with everyone.
He still remembers when he accidentally activated the Evil Eyes for the first time on Liou Zhen's flying magical artifact.
At that time, Xie Miaobo was babbling on beside him.
He almost lost his temper and punched him in the face.
