Devil Fruit: Invincible from the Tremor-Tremor Fruit

In the empty underground fighting arena of the building, the dim lights barely illuminated the surrounding environment, creating a tense and mysterious atmosphere. Daishan and others stood in the spectator area, their eyes fixed on the central fighting arena, looking forward to the upcoming duel.

Mu Bai and Sulfur stood on both sides, and the distance between them seemed to be pulled by invisible tension. The eyes of the two met under the dim light, flashing with unkindness. Mu Bai's eyes were deep and calm, as if he could see through everything; while Sulfur's eyes were full of wildness and provocation, as if ready to pounce on his opponent at any time.

There was a tense atmosphere in the air, which made people feel the tension and intensity of this duel. The crowd of onlookers held their breath, fearing to miss any details. Daishan stood aside, his face expressionless, but his eyes flashed with expectation and curiosity.

Mu Bai and Sulfur stared at each other for a moment, as if they were using their eyes to fight the final battle. Then, the two men moved their bodies at the same time, making a slight sound of joint friction, as if announcing the official start of the duel.

Sulfur grinned, and his figure rushed towards Mu Bai like a ghost. His smile revealed cruelty and cunning, as if he couldn't wait to tear the other party into pieces. He turned his hands into claws and swung them violently. The sharp claws flashed cold light under the dim light, and he attacked Mu Bai fiercely with a sharp wind.

Facing this sudden attack, Mu Bai was not panicked at all. His eyes were calm, as if he had anticipated the opponent's movements. Just when Sulfur's attack was about to touch his body, Mu Bai rolled over and dodged the fatal blow at an almost impossible angle.

Sulfur's attack missed, and the grim smile on his face solidified instantly. He obviously didn't expect Mu Bai to be able to dodge his attack so easily, which made him feel a little surprised and annoyed. However, Mu Bai didn't give him too much time to think. After rolling, he quickly stood up and launched a counterattack against Sulfur with an agile and smooth movement.

The battle instantly entered a white-hot stage. Sulfur's attack was fierce and sharp, and every swing of his claws was a fatal threat; while Mu Bai's dodge and counterattack were as smooth and free as flowing water, which made people marvel. The two moved their figures quickly in the fighting field, and every confrontation triggered waves of exclamations and cheers.

The onlookers were deeply attracted by this fierce duel.

They stared at the two people in the field, fearing that they would miss any wonderful moments. Dai Shan stood aside, and there was still not much expression on her face, but her eyes flashed with recognition and expectation for this battle.

Sulfur suddenly let out a deafening roar: "I am a ghoul close to S-level, Mu Bai, you are looking for death!" His voice echoed violently in the underground fighting field, shaking everyone's heart. As he roared, Sulfur's eyes suddenly turned blood red, flashing with ferocious light that made people's heart palpitate, like two burning flames, revealing the rage and murderous intent deep in his heart.

Then, the scarlet light in Sulfur's eyes became more and more blazing, like two burning flames burning in the darkness. As everyone exclaimed, the position of his tailbone behind him suddenly changed.

The skin there cracked, and with a creepy tearing sound, eight hideous tails suddenly spread out. These tails were as black as ink, with strange patterns on the surface, flashing with cold light. They waved in the air, like eight vicious pythons, ready to give the enemy a fatal blow at any time.

Sulfur's transformation was completely completed. At this moment, he was like a monster from the abyss, exuding a frightening horror all over his body. The eight tails were a symbol of his strength, showing his strength and cruelty as a ghoul close to S-level.

Facing this sudden change, Mu Bai frowned and a trace of solemnity flashed in his eyes. He knew that the power of these eight tails should not be underestimated and he must deal with them carefully.