Underground secret area

Although very angry, relying on anger alone was not enough to make the current Garp perish. Therefore, Rox wasted no time and once again attacked Garp.

"Soul Devouring Prison!"

As Rox extended his hand in a virtual grip, darkness surged from under Garp's feet, quickly engulfing him entirely.

" Meteor Fist"

Seeing the surrounding darkness, Garp took a deep breath. Then he quickly clenched his fists and repeatedly struck the surrounding dark prison.

"Boom!"

With a loud noise, the dark prison shattered under Garp's onslaught. Garp instantly planted his feet on the ground, exerted force from his legs, and his entire body shot forward like a meteor towards Rox.

While a cataclysmic battle unfolded on the surface, underground, it was as if nothing had any impact.

After a period of trekking, Nicholas and Whitebeard arrived at the front of the building complex. The size of the forest exceeded their expectations.

Before them appeared what seemed like an entrance.

The walls of the building were covered in lush vines, giving them a green hue.

As Nicholas and Whitebeard approached, they found a peculiar sight behind the gate.

Inside the building, the architecture resembled that of the Celestial Dragons on the surface.

"So, the Celestial Dragons built this? But what's the point of constructing these things underground?" Whitebeard pondered.

"This place is not useless. If I'm not mistaken, we're about to uncover some truths about this world very soon," Nicholas said, walking towards the building's interior.

Inside, after traversing a long corridor, they came across a surprising scene behind a large door.

Before them lies a vast experimental area!

Whitebeard looked at the high-tech products with bewilderment, as many of them were unfamiliar to him.

However, Nicholas, having seen plenty of sci-fi works, quickly recognized some familiar elements in the experimental area.

As they explored, Whitebeard and Nicholas encountered many strange creatures and technologies, feeling the eerie atmosphere of the place.

Nicholas used his observation haki to sense unusual things, which left him puzzled by the feedback he received.

As they advanced, they found themselves facing more bizarre creatures and technologies, surpassing even Whitebeard's expectations.

Among them was a giant creature with fish-like characteristics, unlike any known species in the world.

Seeing the strange creatures, Nicholas immediately thought of genetic mutations, biological experiments, and life modifications.

As they explored further, they encountered even more surprising sights, including a mini-elephant that perplexed Whitebeard.

The mini-elephant's size reversal was reminiscent of a movie Nicholas had seen before, where animals' sizes were reversed on a mysterious island.

"This must be an experimental facility. Let's continue exploring," Nicholas suggested, intrigued by the discoveries.

Soon, they encountered even more unusual sights.

With the creatures they had encountered earlier as a reference, they found these discoveries surprising but still somewhat acceptable.

However, what they saw next caused both of them to widen their eyes in astonishment.