Lord Forneus has brought a rare magic stone.

"Lord Forneus, it is rare to see you here in the East. You mentioned you had business with me—what brings you here?" "Professor, I have actually brought a certain 'magic stone' today for you to appraise. As an authority on mineralogy, I figured you would be the most knowledgeable person regarding it." "C-Could this be... a 'Tide Stone'?! Lord Forneus, where on earth did you find this?" "You see... a phenomenon involving frequent, unexplained storms and tsunamis was occurring in a certain southern sea region. Nearby islands and passing ships were suffering immense damage. Yet, the weather wasn't particularly rough, and the cause remained a mystery. So, I organized an expedition team and headed there. We discovered that these storms and tsunamis were triggered by undersea earthquakes resulting from recent submarine volcanic activity. Upon investigating the seabed in the area..." "You found that stone." "Yes. Fortunately, one of my team members had a knack for sensing magical energy. They picked up a faint magical signature during the survey, which led us to the discovery." "The stone was likely embedded in the bedrock but was exposed when the earthquake caused a collapse. It has the property of reacting to the phases of the moon and releasing its power during high tide." "Come to think of it, the disasters all occurred during high tide. That explains it." "We were lucky, I suppose. This stone only activates under specific conditions; a 'Vortex Core'—a legendary, ultra-rare magic stone—would activate without such constraints and harbor even greater latent power." "A terrifying thought. In that case, we must immediately launch a full-scale investigation of the area. There could be other stones buried there, and if a 'Vortex Core' were to surface... it could lead to a catastrophe. Professor, I would like to ask for your cooperation when the time comes—would that be possible?" "Of course. It is a fascinating case for me personally, too. It seems there is still so much about the ocean that remains unknown to us." Seventy percent of the Earth is covered by the ocean. And within its depths, countless mysteries still lie submerged...