Facing Rocky's attack, Andy had already collapsed, no longer sane.
He rushed out of the City Lord's Hall, laughing and shouting like a madman, and then began to run away, clamoring to launch the City-Destroyer Cannon...
The City-Destroyer Cannon, the ultimate defense of Sky City, one shot of which was powerful enough to annihilate a Sky City, and could only be fired once. Because once the City-Destroyer Cannon was used, the Super Crystal that powered Sky City would be forced to cease operation due to excessive Mana consumption. At that time, Sky City could only descend to the land, and only when the Super Crystal was fully recharged could it soar to the skies again.