The sky of the Black Prison World had clouds—black in color, heavy in air, boundless in form—spreading across the entire world and filling every corner of the sky.
Then, on this day.
First, the black clouds in the southeastern corner were cleaved apart by a White Rainbow.
Then, countless white specks appeared in the clouds above Black Prison Castle.
At first, those white specks were tiny, like grains of rice, scattered throughout the clouds like a piece of ebony gnawed through by termites. Pitch-black spherical pellets squeezed out from those holes one after another, raining down into the Black Prison World. Then they stretched themselves out, transforming into grotesque insects that slammed against the outer fortress's defenses.
Throughout this process, those white specks did not solidify. Pressed by some inexplicable force behind the clouds, their edges kept writhing, deforming, trembling, and expanding. From the size of rice grains, they gradually grew to mung beans, then soybeans, then watermelons, and so on, never stopping.
Not until the thunder beyond the clouds gradually faded and the singing above the Hell Equation became scattered.
The mottled white spots amid the clouds stopped writhing, their color dimming slightly for an instant.
The entire world held its breath in that instant.
The next moment, the black clouds began to tremble violently. The young wizards looking up at the sky suddenly found the absurd thought the sky is having an earthquake appearing in their minds. At the same time, all those white spots burst into light, as if countless white lamps had been lit upon a black curtain.
Along with the trembling of the sky.
A thick tentacle finally pierced the fetal membrane of the Black Prison World, descending upon this realm the demons regarded as a dead end.
At the tip of the tentacle were