One Piece Chapter 538 — The Depths of Impel Down - Kind: chapter overview - Chapter: 538 - Characters: Ivankov, Magellan, Whitebeard ### Summary Magellan, Ivankov, and the lower prison levels turn Ace’s rescue into a desperate race. The chapter mainly follows Ivankov, Magellan, Whitebeard, keeping the focus on the Impel Down storyline.