The Origin of the Devil Fruit

A dim dungeon.

Water pooled on the rocky ceiling, dripping slowly to the ground. A foul stench permeated every corner. Rats and cockroaches occasionally crawled past, leaving behind disgusting trails. Trapped inside the cage, the only thing that allowed one to retain any hope was the occasional speck of light filtering through the barred window.

"You insolent pirates, let me out at once! I am a great Celestial Dragon! The World Government will break through this place sooner or later and make sure every last one of you dies horribly!"

The hysterical shouting continued without end. At last, Saint Krilaf stopped screaming and sat down on the icy stone bed in exhaustion. He watched the creatures crawling across the floor with disgust and vigilance. Every second that passed felt like a year to him, and unease and fear filled his heart.

Tap, tap...

At the faint footsteps in the distance, Saint Krilaf, whose nerves had begun to fray, abruptly leaped off the bed. Gripping the iron bars of his cell with both hands, he screamed, "Let me out! You lowly commoners who don't know what's good for you!"

"After being locked up for three days and three nights, I didn't expect you to still be so lively..."

Buggy strolled up to the cell door and looked calmly at Saint Krilaf. "It seems I should come back after some more time and see how you're doing..."

With that, he prepared to turn around.

"W-Wait! What exactly do you want?!" Saint Krilaf shouted with almost no hesitation. The higher one stood above others, the more one feared filth and cold, feared approaching death. He could not imagine what kind of ending awaited him if he remained in this sunless dungeon.

"Very simple..."

Buggy slowly uttered the three words, his gaze calmly observing