Carlos had gained a great deal. Over the past three or four months, aside from controlling the creatures of the primordial land to explore and adventure everywhere, throwing Primordial Island into chaos, he had devoted all his remaining energy to even harsher physical training and precise control of Conqueror's Haki.
The precise control of Conqueror's Haki in particular had given Carlos a pleasant surprise. He discovered that although the strength and quantity of his Conqueror's Haki had not changed much, his mental strength had been growing rapidly as his control became more precise. In other words, his Pupil Power was increasing quickly.
The growth of Conqueror's Haki differed from Observation Haki and Armament Haki. It could not be strengthened merely through frequent training. Training only deepened one's control over Conqueror's Haki. What truly mattered was strengthening one's spirit—the stronger one's spirit, the stronger one's Conqueror's Haki!
Of course, that did not mean daydreaming. For example, if you possessed Conqueror's Haki and wanted to become the king of the world, to rule the world, that was your spirit—grand enough, strong enough. But only by accomplishing it could your Conqueror's Haki rise to the level of a world king. Daydreaming alone was useless.
Although they had already spent three or four months on Primordial Island and entered the year 1501 of the Oceanic Era, Carlos still had no intention of leaving. This place was quite suitable for secluded cultivation and growing stronger.
Carlos was not in a hurry about sailing, either. There was nothing he absolutely had to do. Sharpening the axe would not delay the chopping of firewood; the stronger he became, the farther he could go.
Carlos remained on Primordial Island, wholly absorbed in raising his Pupil Power to a level where he could unlock eyes such as the Rinnegan,