"Cursed fate! But wait a moment... a human?"

"What?! You didn't know? He's the master of the 7th Abyssal Dimension, and he hails from Earth."

"Impossible! And he's just a mortal, dwelling among the abyssal demons?"

"Are you so surprised that you wish to fade into nothingness?"

"Heh, as if that were possible. According to my memory, Earth is the lowliest of the manaless, feeble dimensions, that could disappear at any moment, despite breaching multiple barriers."

"How curious. That realm is a peculiar one, where the discipline of science has flourished, unknown or absent in other dimensions. Don't you agree?"

"If my memory serves me right, that dimension lacks higher dimensions of its kind, hence its elevated state. Even after breaking through numerous walls, there is no higher realm to ascend to. Moreover, mana is non-existent, and an ordinary human, lacking in mana, descended into the 7th Abyssal Dimension? That's preposterous. And to top it off, he's become the ruler of the highest realm in the Abyssal Dimension. How did he survive, let alone thrive there? It's a mystery that not even the elders of the Dimension Management Bureau, who've spent eons overseeing the realms, can unravel."

"Do you know how this human found his way into the Abyssal Dimension?"

"I heard from the elders that during the Great Cataclysm of the 3000th dimension, when the 'Dimensional Tower' was created, numerous portals to other dimensions opened. It's possible that a minute 'rift' in the dimensions, linking Earth and the 7th Abyssal Dimension, formed during that time. The rift was fleeting, given the enormous gap between the dimensions, but it's surmised that a human was sucked into it."

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"A most fantastic tale, to journey from the 28733rd dimension to the 7th Abyssal Dimension."

"But this mad human, or rather, this being that's no longer human, has notified us that he must return to Earth."

"What?! What madness is this? Even if Earth is now thriving, it's still a realm that would crumble at the slightest touch of the abyssal demons."

"He's threatened us, demanding that we make a deal. Caspiel, the second-in-command in the 7th Abyssal Dimension, has personally come to convey the message. He insists that we strike a bargain, lest we fade into oblivion."

"Caspiel... That name alone is enough to chill the bones. Such a sudden demand, and we haven't even overseen the Abyssal Dimension in so long."

"He's tasked us with finding a way, since we oversee the 28733rd dimension. Even the second-in-command of the Abyssal Dimension, who once ruled the realm, can snuff out our existence with a mere breath. The second heaven realm can't even act as a defensive barrier anymore. But you're still in your prime, are you not?"

"Although I've heard of Earth through the scientific discipline, I've never been interested in it. It's a realm on the brink of collapse, forced into energy synthesis and research, given the absence of mana, the fundamental energy resource. We paid it little attention, for we believed it would disappear soon enough. But it's still here, standing strong."

"Around 400 years have passed in Earth time since the Great Cataclysm of the 3000th dimension, when the Dimensional Tower was created. During that time, a rift between Earth and the 3000th dimension, although not an official portal, has remained stable. It's allowed many to travel from Earth to the 3000th dimension, despite living as slaves