Somewhere in the East Sea, the waves were always violent and untamed. Underneath those waves was a large swathe of ocean in a much darker shade of blue, making it stand out a little from the waters around it.
If one were to look at it from afar, they could probably see a gargantuan blue eggshell in the middle of that part of the ocean, but upon closer inspection it would reveal that it was actually a translucent dome of light.
Around that single area, thick gusts of blackish cyclones goaded tidal waves, each more violent than the last, crashing onto the translucent dome relentlessly, yet they seemed to inflict nothing.
Through the dome, one could easily make out a single silhouette of an island covered with a shroud of black mist. Occasionally, sparks of different colors would shimmer, one after another.