One Piece: I Rule Them All in the Name of the Demon Spear!

[Overwhelming Haki] + [Demon Gun Subdues the World] + [Founding a Nation and Fighting for Supremacy] + [Legends of the Old Era] [No System] + [No Devil Fruits] + [A Little Crossover Anime Thrown In] Transmigrating into the era of Rocks, Lucius takes hold of the cursed gun. Marine hero? The demon gun brings him to heel! Pirate legend? The demon gun runs him through! At God Valley, the gun points straight at the Celestial Dragons’ “god”: “Survive one shot from me, and…” “Then you can go back to acting so high and mighty.” With Rocks’ fall, he carves up territory and declares himself emperor. The Four Emperors? The Marines? Wherever the gun points becomes his territory. As the Red Line trembles beneath the gun, a question comes from the Empty Throne: “What exactly are you trying to do?!” Lucius strokes the awakened demon gun. Its barrel whispers, an echo from a kingdom of shadows: “Simple.” “Pin the gods of the old era to my gun’s tip…” “Then I’ll define the new world.”