Zoro tightened his grip on the hilts of his swords, his eyes scanning the terrain for any signs of movement. The air was thick with tension, and the scent of salt mixed with the earthy tones of the island. His heart pounded with anticipation as he prepared to confront his nemesis.

Zoro pushed open the creaking gates, stepping into a courtyard littered with fallen leaves. In the center stood Grand Pest, his figure obscured by a tattered cloak. His eyes glowed with malice as he regarded his adversary. "You're no match for me, Grand Pest!"

Grand Pest sneered, drawing his own blade with a swift motion. "We'll see about that!" he retorted, his voice dripping with disdain. The clash of steel echoed through the courtyard as they engaged in a fierce duel, each strike more intense than the last.

With a powerful swing of his Three Swords Style, Zoro disarmed Grand Pest, sending his weapon clattering to the ground. The villain staggered backward, defeated. "Justice is served," Zoro declared, his voice firm and unwavering.

Zoro sheathed his swords, feeling the weight of victory settle upon him. The ominous aura that had once plagued the island began to dissipate, replaced by a sense of peace. As he turned to leave, he knew that the dark island would soon be a place of light and life once more.