Pirates: Whitebeard Retires, Why Does He Become Stronger?

When he traveled through time and became Whitebeard, he subconsciously thought of avoiding the war above and not dying. Just when Whitebeard was thinking about how to avoid the war or bring Ace back, the retirement teaching and strengthening system was activated~~ When the whole world learned that Whitebeard had retired and thought that the Whitebeard Pirates were no longer capable, it turned out that Marco was evenly matched with Kaido of the Beast... In the midst of the war, Warring States was confused: "Marco is not the only one who will reach the imperial level? What the hell?"