In One Piece, the villain Donquixote Doflamingo has been held captive at Impel Down since the Dressrosa ... where Doflamingo mentions that Chief Warden Magellan was specifically assigned as ...

Impel Down is an underrated arc in One Piece that deserves more attention from fans. The 6th level is strange as it lacks the expected torture; it houses powerful figures and guards fear it.