The Cause of Blue Oasis' Biggest Regret?

While the members of Blue Oasis celebrated, Izroth canceled his Twin Lasting Epoch Sentinels. The two ancient warriors faded away along with the sphere with the word "Seal" above it that hovered in the sky. Now that Luna was back in control of her actions, there was no longer any need to restrict her voice magic.

A stream of unknown energy that vaguely resembled a mist gradually made its way towards Luna and entered into her body. The second it did so, Luna felt a sense of completion. This unknown energy was, in fact, the essence of Luna's voice magic that was previously sealed away by Izroth's Twin Lasting Epoch Sentinels.