Nightmare

Nightmares are phantom-like apparitions of trauma created from the Darkness, often manifesting as past figures and enemies to exploit the worst fears of Guardians. First appearing in Shadowkeep, they took the form of several of The Guardian's past foes, including Crota, Fikrul and Ghaul.

Overview
Nightmares are the phantasmal creations made from Darkness-attuned energies seeping from the Pyramid found beneath Luna's surface by the Hive and then became active by Eris Morn upon her discovery.

Initial discovery of the Pyramid was made by the Hive that they experimented with its phantasmal essences using forbidden profane rituals, including the Cryptoglyph and the Scarlet Keep, to immunize from its trauma-inducing influence. Taking the images of various foes the Guardians have faced in the past, the Hidden Swarm under the command of the Daughters of Crota, used the Nightmares to renew their aggression against the Last City's forces.

Though found across the Solar System, the Nightmares can be encountered primarily near and in the Scarlet Keep Hive fortress.

The Nightmares are a very diverse force, taking the forms mainly of the Hive, Cabal and Fallen, bearing all the abilities of them but are much stronger and more durable. Some of the Nightmares grow so strong that they take the forms of the Guardians most dangerous foes, forcing them to conduct Nightmare Hunts to contain them.

Fallen

 * Nightmare Shank
 * Nightmare Dreg
 * Nightmare Wretch

Hive

 * Nightmare Thrall
 * Nightmare Acolyte
 * Swordbearer Nightmare
 * Tormented Servant Nightmare

Cabal

 * Nightmare War Beast
 * Nightmare Legionary

Scorn

 * Nightmare Stalker

Major Nightmares

 * Nightmare of Phogoth, the Untamed
 * Nightmare of Crota, Son of Oryx
 * Nightmare of Skolas, Kell of Kells
 * Nightmare of Taniks, the Scarred
 * Nightmare of Dominus Ghaul
 * Nightmare of Omnigul, Will of Crota
 * Nightmare of Zydron, Gate Lord
 * Nightmare of Fikrul, the Fanatic

Minor Nightmares

 * Nightmare of Reyiks, Actuator
 * Nightmare of Talgoth, Soul Smasher
 * Nightmare of Rizaahn, the Lost
 * Nightmare of Arguth, the Tormented
 * Nightmare of Val Sinu, Hellbringer
 * Nightmare of Lambiks-4
 * Nightmare of Volniks, Deathkeeper
 * Nightmare of Gothrax, Swarm Protector
 * Nightmare of Kelnix Reborn
 * Nightmare Servant of Ir Yût
 * Nightmare of Xortal, Sworn to Crota
 * Nightmare of Loronvis, Council Hand
 * Nightmare of Jaxx, Claw of Xivu Arath
 * Nightmare of Horkis, Fear of Mithrax