From Destinypedia, the Destiny wiki
Reborn Servitors are rebuilt versions of their previous identity, usually bearing the title of "Reborn". Other reasons include replacing another Servitor that has become missing (for example Kaliks Prime). Reborn Servitors are usually Prime Servitors, and they will assume the same duties and responsibilities as their past counterparts.
Reborn Servitors, when encountered, will always bear Major to Ultra health, meaning that vast amounts of damage needs to be poured into the enemies in order to kill them. They will also all teleport randomly. Other abilities will depend on what Reborn enemy is being fought.
Known Reborn Servitors
List of Appearances