The latest dungeon in Destiny 2, titled Duality, is now live in the game for players. It consists of three significant encounters, where everyone needs to switch between two realms to get the mechanics going. The entire mission takes place in Calus' mindscape, where the players need to seek out his true Nightmares.
The dungeon is filled with mysteries and mechanics that will keep you on edge at all times. There are also surprise boss fights, where each encounter takes the mechanics from one and increases the stakes by combining them.
To start the dungeon, head to the Tower, speak to Hawthorn and pick up the "A Single Thread" quest from her. The following article will help guide you through the first significant encounter in the game, where you will need to defeat Gahlran's nightmare.
Disclaimer: The following article is based on the assumption of first jump puzzle clearance and on the fact that you are already accustomed to the realm switching mechanics.
Once you're in the encounter room, several messages will appear in the bottom left corner of your screen. The idea here is to switch planes as you have in the first part of the dungeon and bring back either two of the four Leviathan signs from the Nightmare plane.
The signs are usually called out with Sun, Chalice, Dog, and Axe. You can use whatever callouts you want with your fireteam, but the above terms were initially used in the Year 1 Leviathan raid. You will need to bring in the signs, defeat Gahlran's deception, and start the damage phase.
To get things started, switch to the Nightmare plane by shooting at the bell and looking for enemies in either one of the four rooms in the arena's four corners. Keep an eye out for the "Nightmare Collapsing" debuff, as you will die
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