Ironfort City, the capital of the Sparta Kingdom.
Every brick and stone in this city was made of hard black iron rock. Its walls stood a hundred meters tall and over thirty meters thick, supposedly sturdy enough to withstand saturation bombardment from a fleet of the Four Emperors.
A heavy cannon stood every ten meters along the walls, and thirty thousand elite soldiers patrolled around the clock. Any bird attempting to fly over the walls would instantly be riddled with holes.
This was King Bach's pride, the foundation of his rule, an impregnable steel bastion.
Yet today, the legend of this bastion was about to be utterly shattered by one man in the most outrageous way imaginable.
"Hmm? What was that just now?"
Atop the highest watchtower on the southern wall, the captain on lookout duty, a former pirate with a bounty of thirty million Beli, was boredly scanning the distance through a telescope.
Just a moment earlier, he seemed to have caught a fleeting streak of black and red light out of the corner of his eye, shooting toward the capital from the distant sea at an unimaginable speed.
"Was I imagining things?" He rubbed his eyes and raised the telescope again.
Everything in view was peaceful. Only the faint sounds of cannon fire from the distant harbor irritated him.
"Tch, those rabid Navy dogs again. They really have a death wish." He curled his lip in disdain.
He was already accustomed to harassment on this scale. Those Navy men could not even break through the harbor's defenses, much less threaten the impregnable capital.
Yet the instant he lowered his telescope...
An indescribable sense of mortal danger erupted from the deepest reaches of his soul!
His battle-hardened Observation Haki sounded an unprecedented, piercing alarm, as though the end of