Imu's weapon, the Heavenly Punishment Sword, had once belonged to one of the original Twenty Kings.
True to its name, the sword could unleash the power of heavenly punishment, summoning lightning with power no weaker than Enel's Rumble-Rumble Fruit. In fact, because it was imbued with that strange Demonic Aura, it was even more powerful than the Rumble-Rumble Fruit. Even Oak felt a faint numbing sensation after being struck.
But that was all!
Oak looked at the Heavenly Punishment Sword in Imu's hand. Compared to its power, he was more curious about what made it unique.
The sword was not among any of the renowned blades, yet it was no weaker than those famous swords—perhaps even stronger. It was somewhat like Oak's Seven Star Sword: it could enhance its wielder's strength and contained some kind of power within itself.
Not only could it unleash the lightning of heavenly punishment, but it could also pierce through Oak's attacks and send its edge straight at the target.
How had this sword come into being?
Oak badly wanted to know.
He had once speculated that his Seven Star Sword might, in a sense, be a special Devil Fruit. Due to some accident, it had taken the form of a sword, yet it contained the power of a Devil Fruit within it, which its user could awaken.
After all, according to Vegapunk's research, Devil Fruits were essentially the manifestation of people's wishes.
Oak had always believed that his Seven Star Sword was unique, the only one of its kind in these seas. But after seeing the Heavenly Punishment Sword in Imu's hand, he no longer thought so.
The Heavenly Punishment Sword was likely a creation similar to the Seven Star Sword. If that was true, it meant that people had mastered the ability to