These words confirmed Roland's guess, which was that the God's Stone of Retaliation did not affect magic power, but witches' abilities.
"Besides the Chaos Beast, did the Quest Society find any other ways to produce Magic Stones?"
Agatha shook her head. "It's easier said than done. The Union once had a witch who could turn God's Stones of Retaliation into regular stones, but all she did was to remove the magic power—it wasn't nearly enough to even produce the simplest Stones of Light." She turned to Sylvie. "You can see the form of magic power, so you should also be able to see the real forms of these crystals."
"It's a ball of faint... fog," Sylvie said with an unsure tone.