Just then, a thought flashed through his mind like lightning. Without the slightest hesitation, he let out a deafening roar: "One Bone!"
At the same time, he drove his Zanpakuto, Ryūjin Jakka, into the empty ground beside him with overwhelming force.
In an instant, he clenched one hand tightly into a fist.
With his exquisite mastery of Shunpo, his body streaked forward like lightning tearing across the sky, moving at an astonishing speed.
In the blink of an eye, he was directly above Luffy's head.
Before everyone's eyes, he raised his arm high, then swung a heavy punch at Luffy with all his strength.
The punch carried earth-shattering might, as though it would tear the very void apart.
"Ha... Rubber Enma Seal!"
Having clearly perceived Genryūsai Shigekuni Yamamoto's every movement, Luffy suddenly spun a full turn. His right foot, coated in Color of Arms and Color of Observation Haki, swept out in a vicious, whirlwind-like spinning kick to meet Genryūsai Shigekuni Yamamoto's iron fist head-on.
Genryūsai Shigekuni Yamamoto stared fixedly ahead, his gaze blazing.
Unexpectedly, however, the first punch he had thrown with all his strength had no effect whatsoever.
In a flash, Genryūsai Shigekuni Yamamoto withdrew his fist without hesitation, his movements flowing smoothly, as though everything were under his control.
Then he drew a deep breath, tensed every muscle, and exerted himself again, gathering his strength into both arms.
"Two Bones!" came his furious roar.
This time, his method of attack changed dramatically.
Instead of a single fist, he now struck with both fists at once, from tricky angles that were almost impossible to guard against.
At the same time, Genryūsai Shigekuni Yamamoto's presence surged abruptly, raging like an erupting volcano.
"Heh heh heh... Gum-Gum King Kong Gun!"
On the other side, Luffy refused to be outdone.
By