Level 6 Eternal Hell

Luffy, Ivankov, and Inazuma batter through traps and guards on their descent to the lowest floor, only to reach a vacant cage where Ace had been held. Spotting the straw hat, Jinbe is stunned that Hancock spoke the truth and that this boy actually reached the most restricted depths of the prison, and he urges him to chase Ace, who just took the lift upward. The watching staff retaliate at once: a spiked slab falls across the cables of the lift, a steel enclosure seals off the stairwell, and sleeping gas floods the chamber, dropping Luffy where he stands. One floor above ground, Magellan pins a despairing Ace and tells him resistance is pointless, since a pirate who entered this place was finished from the start.

With the gas rising, Inazuma reshapes his hands into blades using the Choki Choki no Mi, shears the stone floor into ribbons, and packs them over the staircase to choke off the fumes. Sealed in, Ivankov first proposes leaving the rescue to Whitebeard and simply getting Luffy out, but the boy flatly refuses and resolves to follow his brother to Marineford, brushing aside warnings about the admirals and Warlords gathering there. Crocodile bargains to carve an exit through the ceiling in exchange for freedom and a shot at Whitebeard, and Ivankov consents, hinting at a buried weakness that keeps the man obedient. Jinbe likewise begs release so he can save Ace himself, and Luffy gladly accepts. As the freed pair lock eyes and threaten each other, Inazuma observes that two Warlords now ride with the escape, a fact that catches Luffy off guard regarding Jinbe.

The Marines take custody of Ace, his Vivre Card no longer pointing toward the cell. Inazuma's power is named as the Choki Choki no Mi. Ivankov and Crocodile turn out to have a shared history, with the former holding a secret weakness over the latter. Both Crocodile and Jinbe sign on to help Luffy reach his brother.

The Japanese title reads Level 6 Eternal Hell. A color spread on the cover shows Robin reading aloud to the Straw Hats and a crowd of animals, with Zoro, Luffy, and Franky asleep and Brook accompanying the tale on music. Events fall within the Impel Down storyline.