After defeating Kronos Percy and his fellow demigods are rewarded. During the ceremony a book lands on top of Athena's head with a note from the fates.

As the tittle suggest Naruto will unlock his strength, speed and durability during the stealing of the forbidden scroll. Where he found a section that has his last name on it. His strength, speed and durability are not chakra assisted, also the moment he read the section that unlocks his new found power his mask of stupidity, the loudmouthed idiot and knucklehead now destroyed.

Dragons and king aren't all that different. They both take what they want, when they want to take it. So a dragon king would do the same. Natsu's mating season is upon him, and he will take who he wants. P.S This is not my story this is a story of my friend