The Nerve Blade

Rogge did not think so. Suppress Crocodile? It was not that simple.

Could this guy really not use Haki?

You're overthinking it. Judging from the later additions to the story, Old Sand definitely wasn't that simple. After all, he had once made his way through the New World. How could he have no tricks up his sleeve?

The two clashed again. Rogge had actually only just managed to use Armament Haki.

Awakening Armament Haki in battle was one thing. Armament Haki was essentially a consumable resource, just like stamina. No one could remain full of energy forever; even the muscles in the body needed rest.

The same principle applied to Armament Haki. Its effects in battle were especially obvious, mainly in defense and offense. Since Rogge was fighting, combined with the anger in his heart—

Crocodile's repeated contempt was unbearable to someone with Rogge's explosive temper. Burning with rage, he wanted to land a heavy punch on the man. He had not thought of Luffy's water-based method of fighting Crocodile.

He wanted to rely on his own strength to teach Crocodile a lesson. In his desperation, Rogge had not expected that by concentrating all his attention on his fist, he would actually manage to use the Armament Haki he had dreamed of.

However, it was difficult to find that feeling again. At the beginning, using Armament Haki required finding the right sensation. When Luffy first trained in Ryuo, he had also used it in a desperate moment, but he could not use it again afterward. Only after Hyogoro's guidance had he managed to project Ryuo outside his body.

Rogge's current problem was even more troublesome than Luffy's. At least Luffy had top-tier teachers like Rayleigh and Hyogoro helping him. But what about Rogge?

He could only rely on that instant