It goes without saying that the Holy Sword should not be used casually in front of others.
It could be used in front of trustworthy people or in unavoidable life-threatening situations, wherein Shane would unseal and use its power without hesitation; but in the current situation, Shane didn't feel that he was pushed to that extent.
Moreover, Cappelen's replica of the Holy Sword would unlock its original restrictions upon encountering the real Holy Sword, and even absorb its power to attain the form it should have—a weapon that would become stronger if Shane unsealed the Holy Sword here as well.
Such acts of aiding the opponent and making them stronger were not something Shane wanted to do.
With that thought, Shane suddenly smiled.
"I still have much more power to show, why should I use my trump card?"
Indeed.
Although Cappelen, having used her Unique Skill, had become very powerful, Shane had also grown much stronger.