Playing the Black Dragon King, Starting with the Battle of Marineford!

Mu Tian unlocks travel across the myriad heavens and obtains the God-Tier Character Roleplay System.

He takes on the role of Hei Longtian and battles across countless worlds!

Three years after transmigrating to the first world, he reaches its pinnacle in just six months. Invincibility and loneliness accompany him as he lies flat for two and a half years. There is no one left in that world worth fighting, not even enough to rouse him for a half-hearted attack.

At last, travel across the myriad heavens begins again.

He transmigrates to the world of One Piece, starting from the Summit War!

With invincible might, Mu Tian crushes everyone at Marineford, shocking the entire sea!

Kaido: Red-Haired, stop trying to hold me back. I wouldn't dare go to Marineford.

Sengoku: This monster is many times stronger than Whitebeard!

Luffy: You be the Pirate King!

The Naruto world

Night Guy: With him around, even a hundred kicks from me wouldn't bring this to a grand finale!

Uchiha Madara: Even at my peak, I couldn't make this man dance!

This novel and its characters are entirely fictional. Any resemblance to real people or events is purely coincidental. Do not imitate.