One Piece: Kaido's adopted son, starts with the Eight Gates Formation.

Lynn is transported to the world of One Piece at the start. Good news: he starts with top-tier Conqueror's Haki. Bad news: he's a baby!
Just as he was about to be bitten by a poisonous snake, Kaido, in a split second, committed suicide by falling from a great height, saving Lynn from harm.
Lynn also unleashed his Conqueror's Haki, attracting Kaido's attention and joining the Beast Pirates, where he was adopted by Kaido!
After surviving for 100 days, Lynn obtained the Dragon Ball "Flying Technique," allowing him to fly without using his Devil Fruit ability, stunning everyone in the Beast Pirates!
After surviving for a year, he obtained the Hokage's [Eight Gates Formation], opened seven gates, and defeated a Marine Vice Admiral, shocking the entire Marine Corps!
If you survive to the age of three, you will obtain the [Special Beam Cannon], which can be blocked even by the Four Emperors with a single finger!
That's not all; there's also Susanoo, Planetary Devastation, Kamui, Instant Transmission, and more...
Kaido: "I've been sitting in this Yonko position for too long, it's boring. Im, get down. I want to sit on the throne of the King of the World with my adopted son, Lynn!"