Choir of One is an interesting Exotic Auto Rifle that was released with Echoes Act 3 in Destiny 2, and it has three catalysts you can get and choose from. You need to find secret chests in the Exotic Mission part of Act 3's story in order to unlock them, and if you don't know where to look, it can be really challenging to figure it out for yourself.
If you don't have Choir of One yet, you need to complete the Encore Exotic quest to get the Auto Rifle alongside the Pattern for crafting. Once that's done, the work starts to unlock the Subsistence, Destabilizing Rounds, and Onslaught Catalysts. You'll have to get specific quests from Banshee to see what you need to do to get each, and once you've completed the quest, hand it back to Banshee to unlock each Catalyst.
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How To Get The Subsistence Catalyst For Choir Of One
Once you've completed Encore for the first time in Destiny 2, head to Banshee-44, and he'll give you the '//Choir: Eternal' quest. This asks you to find a secret chest in Encore and complete the mission on Expert difficulty.
To find the first chest, you need to first complete the specimen research for the NES007 sample and collect the Conductor's Imprint Codes from Failsafe. Then, launch into the Encore mission and progress until you reach the first puzzle where you have to run around with connection nodes. Instead of going straight to progress the quest, look for a secret area on the left and go through until you see a Vex Spire in the middle of this room. Access the spire; and cubes will start appearing above your head.
You need to shoot the cubes in a specific order, and you'll be able to tell which cube to shoot by looking for a smaller, white cube that appears underneath them. Once the first four cubes have been destroyed, four more will appear around the room. Follow the same process; look for the smaller white cube, and shoot the cube above it to sync the system properly. Once this is done, a chest will appear — this is the chest you're looking for to complete //Choir: Eternal.
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How To Get The Destabilizing Rounds Catalyst For Choir Of One
The Destabilizing Rounds Catalyst can be acquired by completing the '//Choir: Upheaval' quest, which asks you to complete the Encore mission on Expert difficulty in Destiny 2 and unlock another secret chest. To get this chest, you need to progress to the end of the quest where you reach the Ishtar Research Facility.
When you first enter the room, look for a Vex Spire in front of a dormant portal. Access the spire, and the portal will open, then go through it. You'll find yourself in a room with three portals, and you need to go through the left one.
You'll find yourself in a cave-like system, and there will be a DELETION node in front of you, near the entrance (DELETION node one). For now, go past this node and run through the cave system until you see a second DELETION node (DELETION node two). When you see this node, go along the path opposite it, and you'll find a DELETION Module Bearer — a Minotaur. Kill the Minotaur, then grab the DELETION Module it dropped. Before you head back, turn the corner to find a Vex Disc.
Now, head back to DELETION node one, install the Module, then head into the new pathway that was previously blocked. You'll find a second DELETION Module Bearer here. Defeat the Minotaur, then grab the DELETION Module it dropped and backtrack to DELETION node two you found near the first Module Bearer. Insert the Module here, then go back again to grab the Module from DELETION node one. Backtrack to the second DELETION node, go through the path, and find a third node and another Vex Disc to grab behind it.
Once you're done here, take both the DELETION Modules from their nodes and head back to DELETION node one. Insert the Module to open the pathway, then look for another DELETION node on your left. Open it up to a smaller cave, which you need to go through to find another Vex Disc.
Grab the DELETION Module you just used and go straight from the cave, then right up the stairs in this room. Place the DELETION Module in the next node you find. There's an ACCESS Module Bearer in this room that you need to kill for an ACCESS Module. Grab it, then backtrack a bit to find the ACCESS node near the most recent DELETION node you opened.
Head inside to find and kill the PARTITION Module Bearer, and look for a Vex Disc in the very center of this room. Grab the PARTITION Module, insert it in the only node in this room, and you'll find yourself back near the entrance where this all started. But, now, the chest you need will have spawned.
If this doesn't work, and you've possibly missed a Vex Disc, or you're getting lost; remember to follow your Unknown Proximity Sensor — this will lead you to all the Vex Discs in the area.
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How To Get The Onslaught Catalyst For Choir Of One
The final quest Banshee-44 will give you will be '//Choir: Escalate,' and like the others, it requires you to complete Encore on Expert difficulty and find a secret chest. This chest can be found in the same place as you found the one for the Destabilizing Rounds Catalyst, so start in the Ishtar Research Facility near the end of the Encore mission.
Like before, go through the portal that opens when you access the Vex Spire, but go into the right portal instead of the left this time. Kill all the Vex, but pay special attention to the two Hydras on either side of the room.
Once all the Vex are killed, a Minotaur and a CONNECTION Module will spawn near the entrance. Kill the Minotaur so it will drop a beam weapon, then grab it. Use the CONNECTION Module in the node that's closest to the entrance where you came in.
Now, go to where you killed the first Hydra on the left to spot a Vex circle and stand in the center of it. You'll see rings spawn all around you, but you want to aim the beam weapon in the center of the ones closest to the entrance. Aim for the mirror that spawned when you used the CONNECTION Module, and you'll destroy some orbs inside.
The orbs look similar to the small, white cubes you had to shoot in //Choir: Eternal.
Repeat this process a few times by looking for where the orbs inside the main construct spawn. Take the CONNECTION Module to the relevant node, install it, and stand in the circle to aim at the mirrors. Once you've done this enough times, a second CONNECTION node will spawn at the back of the room.
Grab this second CONNECTION Module and install it next to the node where the orbs start spawning. Essentially, you're doing the same thing again, but you need more mirrors to do it. The CONNECTION nodes are there to spawn the mirrors and kill the new orbs that spawn inside.
If your beam weapon's ammo ever runs out, another Minotaur will spawn each time, so you can get a new one.
Once you're finished, the construct will disappear, and you'll find the chest you need in the middle of the room. With that, you'll have completed all three quests to unlock the Exotic Catalysts for Choir of One.
Best Catalyst For Choir Of One In Destiny 2
The best Catalyst among the three for Choir of One is Onslaught. This Catalyst boosts your rate of fire as you kill enemies, making it possible to do more damage quickly. The only issue you may find with it, though, is that it can get quite heavy on ammo use.
You can work around this by leveling the weapon and unlocking the Alloy Magazine when you reshape it. 
Alloy Magazine gives you faster reloads when the magazine is empty, which essentially makes sure that you can get as much damage out as you can with the ammo you do have.
Subsistence partially reloads the magazine from reserves when you defeat targets, and Destabilizing Rounds cause nearby targets to become volatile when you land final blows. Both have their place, and it's not to say they're bad, but Onslaught gives Choir of One an edge in battle in Destiny 2.
Destiny 2
- Released
- August 28, 2017
WHERE TO PLAY
- ESRB
- T For TEEN for Blood, Language, and Violence
- Developer(s)
- Bungie
- Publisher(s)
- Bungie
- Engine
- Tiger Engine
- Multiplayer
- Online Multiplayer, Online Co-Op
- Cross-Platform Play
- PC, PS4, PS5, Xbox One & Xbox Series X|S
- Cross Save
- yes
- Expansions
- Destiny 2: Forsaken, Destiny 2: Shadowkeep, Destiny 2: Beyond Light, Destiny 2: The Witch Queen, Destiny 2: Lightfall
- Franchise
- Destiny
- Number of Players
- 1-6 (Co-Op)
- Steam Deck Compatibility
- no
- Platform(s)
- PS5, PS4, Xbox Series X, Xbox Series S, Xbox One, PC, Stadia
- Genre(s)
- FPS
- How Long To Beat
- 100+
- X|S Optimized
- YES
- PS Plus Availability
- Essential, Extra, & Premium (The Witch Queen)
