After Kaido reverted to his dragon-man form, Setsuna was still riding on his back, his fists wrapped in Conqueror's Haki as he unleashed a frenzied barrage.
Every punch contained mountain-splitting, rock-shattering force, landing on Kaido's solid back muscles with dull booms.
Kaido was ruthless too. He directly swung his black lightning-wreathed spiked club at his own back.
The blow carried overwhelming force, with no concern for whether it might injure him.
Setsuna leaped off Kaido at the last moment, and a thunderous boom rang in his ears.
Kaido staggered from the full-force strike he had dealt himself. The flesh on his back split open, but the wounds began healing at a visible speed.
"I still want to ask: where exactly do you hide that spiked club? Doesn't it get in the way when you transform?" Setsuna asked curiously.
Kaido ignored his question and brought Hassaikai, wrapped in black lightning, crashing down. Hachinosu instantly split open with a massive canyon, nearly cleaving the entire island in two.
The air compressed to the extreme, forming visible shockwaves that spread in every direction.
Instead of retreating, Setsuna advanced. Conqueror's Haki condensed around his right fist as he met the attack head-on.
The instant the two forces collided, Kaido's spiked club was knocked high into the air, while Setsuna's fist split open with bloody cracks. Yet neither of them retreated a single step.
Kaido grinned savagely. As his body leaned slightly back, his left fist shot out like a cannonball. Setsuna met it head-on with his own left fist.
Their fists collided, and the muscles in both their arms twisted and tore apart before healing at astonishing speed.
While Setsuna and Kaido were engaged in fierce battle, Zephyr stopped the Three Calamities from entering the battlefield.
"Your mechanical arm has already been destroyed, and