Speaking of which, Mousse had originally thought that his second brother would abandon the Demon Halberd after changing Devil Fruits, because in his memories, Logia-type Devil Fruit users basically fought barehanded.
Of the two exceptions, Smoker's jitte could not be elementalized, while Enel's Golden Trident had been hastily created through "Thunder Metallurgy" after he discovered that Electric Shock was ineffective against Luffy.
If that had been the case, Katakuri's strength would still have increased significantly after changing Devil Fruits, but his offensive power might actually have weakened considerably. After all, it could be said that Katakuri only gained first-rate attack power after acquiring the Demon Halberd. Moreover, after switching to the Rumble-Rumble Fruit, he had also lost the boost from hardened mochi, and would most likely have ranked near the bottom among S-rank powerhouses.
Fortunately, that was not what happened. Mousse almost immediately came up with a method to combine the Demon Halberd's power with the Rumble-Rumble Fruit's abilities, which he named "Triple Strike":
Before making contact with the enemy, release lightning first. Ideally, it would paralyze the opponent; even if it did not, it could still deplete their Armament Haki, making the following attacks easier. That was the first strike;
Then stab the opponent while infusing the attack with Conqueror's Haki—against thick-skinned foes like Kaido—or Armament Haki—against Logia-type powerhouses who could elementalize, or fragile enemies who could not take a beating. That was the second strike;
After the Demon Halberd pierced the target's body, discharge electricity with the spearhead as the positive pole and the blade tip as the negative pole. Since the human body was a good conductor, the resulting current was far more powerful than discharging electricity through the air. Moreover, because the current was inside the opponent's body, it was even harder to defend against with