I, a Saiyan, Was Ordered to Destroy the Naruto World!

(Dragon Ball + Naruto crossover; no power nerfs, just invincible domination)

In Age 728, Yato transmigrates into the body of a Saiyan infant with a power level of 1 at birth.

In Age 732, Yato arrives on the Naruto planet with a power level of 300.

As a Saiyan warrior with a power level of 300, Yato utterly crushes the Naruto world.

Everything the Naruto world has to offer-kekkei genkai, forbidden jutsu, space-time ninjutsu, sealing jutsu, and more-sends Yato's power level skyrocketing.

And the Naruto planet is only the beginning.

In Age 732, Vegeta, the prince of the Saiyans, is born. Yato's power level reaches 10,000, earning Emperor Frieza's admiration, and he forms his own Saiyan Special Forces.

In Age 733, Yato leads his Saiyan Special Forces in a forceful arrival on the One Piece planet. Using the Op-Op Fruit, he gains an immortal lifespan. With the Age-Age Fruit, he skips straight past his Saiyan childhood. After consuming a Fruit of the Tree of Might, his power level soars to 100,000. He then descends upon Planet Cereal, where his overwhelming might allows him to summon the two-star Eternal Dragon and wish for his power level to double every year.

In Age 737, Kakarot and Broly are born, Planet Vegeta is destroyed, and Yato successfully unlocks his Super Saiyan transformation.

In Age 749, just as Goku takes his first steps beyond Mount Paozu on Dragon Ball's Earth, Yato is already leading his Saiyan Special Forces in invasions of other Dragon Ball timelines and universes.

In Age 762, on Planet Namek, Yato crushes the Z Fighters with absolute power.

Yato declares, "My power level is 5.3 sextillion!"