Undead Reapers are deadly assassin's to Jolly Roger's Army. They appear at every single island beside Cuba because Tia Dalma protects it. Undead Reapers are the hardest undead there is. They don't appear during invasions though because they are used for different purposes during invasions. They started to appear when the peddlers appeared... There are also a different type of Reaper called Fear Reaper.