Resurrection

Resurrection is the paracausal ability of coming back to life after death.

Guardian
Ghosts are small, sapient machines created by the Traveler shortly after the Collapse. Their sole purpose is to locate and resurrect deceased individuals capable of wielding the Light as Guardians, and to support their Guardian charge in combat.

Hive
During the war with the Ecumene, Auryx came to realize that the Worm had deceived him and his sisters: their Worms appetites were growing past their ability to feed with death. Meeting with his sisters in his ascendant realm, surrounded by their servants (some of which despised them for showing weakness) they despaired over their dilemma. When his sisters offered their power to help Auryx find a way to save them, Auryx killed them, then used that power to confront his patron god Akka, the Worm of Secrets. He killed Akka so that he may steal its ability to call upon the Deep and created the Tablets of Ruin, which gave him the power to Take. His transformation complete, Auryx was now Oryx, the Taken King. During the subsequent war with the Ecumene, Oryx revived Xivu Arath in an act of war, and revived Savathûn in an act of cunning.

Necromancy is a practice involving the use of paracausal abilities to resurrect the dead. It is considered by Oryx's Hive to be a violation of The Sword Logic, and therefore forbidden; however, it has been employed by the heretical Hive Prince Nokris, who was taught the secrets of necromancy by the Worm God Xol. Xol himself used necromancy to resurrect several individuals of various races who had been slain by the Guardians, including Valus Ta'aurc, Drevis, Wolf Baroness, and Urzok, the Hated, before Taking them and converting them into Ta'aurc, Aspect of War, Drevis, Aspect of Darkness, and Urzok, Aspect of Hate respectively. Many of Savathûn's Hive have the title "Revenant" attached to their names, suggesting that Savathûn and her subordinates also employ necromancy.

When the Daughters' efforts at resurrecting Crota and Oryx proved in vain, Kinox saw an opportunity to rally the leaderless Hidden Swarm by reanimating the deceased Zulmak as their puppet champion, with Hashladûn offering the phantasmal essence of the Nightmares as a catalyst to infuse into Zulmak's husk recovered by Besurith and Voshyr, creating the first hybrid of a Hive infused with the power of the Nightmares.