"This is indeed a gem that I found in the treasure of the blood gnome king. You should all be able to feel its strength; it is a Void gem.
I had intended to leave this gem where it was. But I felt that the strength of the Void was too dangerous for your elf clan. So, I wanted to take this gem and keep it safe.
But who could have anticipated that the moment my hand touched the Void gem, it would embed itself into my palm? Now, I am constantly under the influence of the Void's strength.
This is why, at the beginning, I did not immediately feel the weakening of the God of Moon's strength."
Sebastian chose not to deny anything, knowing that the people before him were not easily fooled. Moreover, he took this opportunity to explain his earlier unusual behavior.
Upon hearing this explanation, Luna's eyes brimmed with tears. In her view, Sebastian's affliction by the strength of the Void was solely for the protection of the elf clan.