"To use the same method as him… You are indeed dangerous," the time spirit said.
"As him? Uvish created this kind of barrier After throwing away his body?" Billy asked. "This isn't something someone can pull it off and control in spirit form. Besides, why did he need my body if he could do this?"
"His technique was different… In a sense… He sealed our powers inside us," the time spirit replied. "His technique also didn't let him use his mana to increase his magic potential like you."
Basically, Uvish just thought of creating something that would be easier for him to control others and increase his strength safely. That was his system… But now, with Billy's developed technique, there wasn't much need for that. Even with the incomplete version of the physical limit break, he could obtain fearsome results as well…