Duality (dungeon)

Duality is a Dungeon that was added to Destiny 2 in the Season of the Haunted. It revolves around Eris Morn sending a fireteam into the mindscape of Calus, only to find it a schism overrun with his Nightmares. Guardians must fight through the shame haunting the emperor to steal knowledge from the deepest parts of his consciousness.

Bosses

 * Nightmare of Gahlran, Sorrow Bearer
 * Nightmare of Emonut, Sworn of Moli Imoli
 * Nightmare of Ka'hok, Sworn of Umun'arath
 * Nightmare of Uroa, Sworn of Shayotet
 * Nightmare of Caiatl, Princess-Imperial

Rewards
Heartshadow

Trivia

 * Duality is the first Dungeon to feature the Cabal.
 * When traveling through Calus's mindscape, the Cabal in the mindscape change. In the normal realm, the Cabal are those from the Loyalists, in the nightmare realm, the Cabal are those from the Red Legion.

List of appearances

 * Destiny 2
 * Season of the Haunted