Right now Brooke has the ability to be undead thanks to his revive revive fruit, the only way a devilfruit can be passed on to someone else is if the holder dies. In Brooke's case he is already an undead being so how would he die? Would this make him eternal? If you think about it the only other possibility is by consuming a dragon elixir. What would happen if a holder had both these things 🤔