To buy the escaping team enough time, Luffy must hold off the unstoppable Magellan. Since touching Magellan directly means instant poisoning, steps up in a massive way:
Check out the epic action of Luffy and his allies pushing past their limits to escape the world's most secure prison: One Piece (Dub) Episode 449
After discovering that Warden Magellan has defeated both Emporio Ivankov and Inazuma, a furious Luffy prepares to head back and fight. However, Jinbe and Mr. 2 (Bentham) hold him back, reminding him that the ultimate goal is escaping the underwater prison. To buy the escaping team enough time, Luffy