Garp's Defeat!

If Garp hadn't caught him and beaten him up this time, Ron might not have discovered the fatal flaw in Black Prison Thunder Realm until the day he faced Kaido or Oric.

This was a space assimilated by the Awakening Stage 3: Assimilation power of the Rumble-Rumble Fruit. Even light had been replaced and controlled by lightning, existing or vanishing at Ron's whim.

Anyone who entered this space had to endure the corrosion of lightning's assimilating power at every moment. Moreover, because the space was filled with the power of lightning, there was almost no oxygen...

That was the problem!

Almost none did not mean completely nonexistent.

Once the air completely vanished and formed a vacuum, atmospheric pressure would instantly destroy the framework built by the lightning inside. Unless Ron was willing to devote the effort to using his assimilating power to resist atmospheric pressure.

Unlike Dragon, leader of the Revolutionary Army, and his Hurricane Fruit, setting aside whether Ron's lightning could create a vacuum, the consequences of doing so alone would force him to waste most of his energy resisting atmospheric pressure.

Therefore, Black Prison Thunder Realm was not truly an oxygen-free zone. The clearest proof was that Ron could move freely within it without being affected at all.

The lightning assimilation corrosion not affecting him could still be explained by the Rumble-Rumble Fruit, but how could he survive without oxygen?

Garp keenly noticed that point and successfully took advantage of it.

"Reputation is never unearned. When dealing with you, I really can't afford to let my guard down!"

Floating in the seawater beneath an Electromagnetic Barrier, Ron used his lightning senses to "look" at Garp, who was trapped at the very center of Black Prison Thunder Realm, veins bulging all over his body as he struggled to resist.