The brand-new "" mission in has a pretty neat puzzle for Guardians to figure out; play the right notes on the organ in the Bailey in order to explore all the secrets the mission has in store.
The organ itself is front-and-center as players begin the mission, but without knowing what to do with its mysterious notes, there's no telling the actual function of the instrument.The organ starts out with only a few notes available, soplayers will need to run the mission a few times to fully unlock it. Following the questline received from Eido after launching the Act 3 update, players have to run the "" mission three times, picking up the catalyst quests as you go. If you did pick up all four catalyst quests, you should run the mission on Expert the third time you run it, which will allow you to fully upgrade Slayer's Fang on your final run through the mission.
The last run should also see the organ fully upgraded as well, allowing you to input all eight codes in the same run. The organ is inscribed with Eliksni notes, and playing it is difficult without any sheet music.
It works similarly to the music puzzle in «Captive Memory» from Act 2. Thankfully, there are codes scattered around the mission that guide players. For ease of reading, the nodes on the organ can be numbered one through 13, left to right. Here is each code currently discovered for the organ, as well as its effect and where it can be found for those curious Guardians: Organ Code Effect Location Tagline 1-8-1-9 Unlocks one of the Exotic tonics with Eido.
Found on a pillar before walking up to the organ. "." 2-11-1-10-7-6 Opens a door in the Right Bailey that rewards the second Intrinsic Frame. (You begin with Intrinsic Frame one) On a wall along the right-hand path away from the organ. "." 1-4-11-1-4-10 Opens a new door in the Mirror Gallery, in the room with the large tree in the center, rewarding Intrinsic Frame three.