The 500 Million Berry Man! Target: Usoland! - S16.E681

As the people of Dressrosa see their friends and loved ones slaughter each other under the manipulation of Doflamingo, memories of 10 years ago rush back, and the truth of that event becomes clear. Doflamingo announces the rules for his deadly game - targeting Luffy, King Riku, and Law, but with the highest bounty reserved for Usopp!