Noel was amused by the power. "Whoa. You are the one using the Divine Slash now?"
[Yes. My body is the container of the system, while the scabbard is the container of the flame. What do you think about my heart?]
"Ah! Is it the container of spiritual energy?"
[Indeed. Don't forget that while I am a spirit, my form is that of a magic sword. I am supposed to be able to handle spiritual energy myself.]
"Now that I think about it, unlike other spirits, you have a full form in this world."
[That's right. Hence, I should be able to use my spiritual energy. When my previous heart was used to weaken the demon king, I used the stored energy to slow it down, and when the spiritual energy was completely exhausted, it was the time the demon king woke up.]
Noel had heard about the heart being an alarm. So, that was the principle behind it.
