OPE OPE NO MI AND GOROSEI

Ope Ope No Mi is able to grant one iternal life in exchange for DF user life. I think that this ability had been used when DF user was about to die. The

Chapter Secrets – Chapter 1073 in-depth analysis – The Library of Ohara

Law won't use his surgery on Luffy or the Strawhats and here's why. : r/OnePiece

One Piece: Every major incident and revelation in the Reverie flashback - Dexerto

The Gorosei may be immortal, but they certainly aren't hundreds of years old. : r/OnePiece

One Piece Chapter 1037: 7 Devil Fruits the Gorosei could've been referencing

JA SEI O QUE SÃO AS AKUMA NO MI DOS GOROSEI E DE IMU SAMA! SABO VS FRUTAS DIVINAS? One Piece 1085

Chapter Secrets – Chapter 1086 in-depth analysis – The Library of Ohara

Speculations - Nami is one piece

Who is Imu- Sama In One Piece? And why are the Gorosei Afraid of him? - Quora

Five Elders (Gorosei) in One Piece: Names and Powers

Character Discussion - The Gorosei and Imu probably aren't as remarkable as you think they are.

Five Elders, Villains Wiki