The Fortress of a Thousand Crystal Birds

Crystal Bird is a abyssal dream in Dream Game. It was unregistered from :info. Visiting this dream involves having a server that has a runtime of at least 3 days and have done a titanic list of interactions within that same server; formerly the dream required a 7-day old server. Once all of that is successfully done, you will need to examine the unique scarecrow in Windy Island to activate the dream.

You can also visit this dream using the shortcut you get after visiting the dream once located near the ID Card to Lil Big World or Autumnal Resolute 2. (You need to be in the server before the dream loads to get it.)

Main Island
You start off in a huge grassy island with a glossy finish. You can witness many broken structures and rib-cages scattered throughout the area. This island can be divided into 3 sections. All of the areas have various grind rails that are usable with the roller-skates. Some of these rails connect to the other areas of the island, which allows for quick travel between them.

Plastic Plains
Near the 12th house, you can find a scroll in a broken building. Nash will comment how it can upgrade her netting abilities, which permanently unlocks the ability to net the cars present in Lil Big World. The Headda can roam around here as well, one or two spawning around.

Maroon City
Many Sauries litter the area. They can be very dangerous when approached, so exploring the area should be done with caution. Atop one of the structures, there is a black stud that grants some studs. There are various smaller "structures" around, and some large decals that picture an eye in a few areas. There is also a large eraser shaped creature(?) with a classic smile.

PSY Scroll House
Inside the run-down building with 2 Roller Skate rails connected to it, an intractable scroll can be found that improves Nash's PSY abilities. Currently, the only known use for this upgrade is the ability to net the racecars in Lil Big World. Other vehicles, such as the boats in Graveyard Sea, do not seem to become nettable upon interacting with the scroll. This upgrade also appears to be permanent, persisting upon leaving and rejoining the game.

Pinwheel Peninsula
A large cloudy pinwheel like structure can be found at the end of this section. The top of this structure spawns a pink stud, which grants approximately 4K studs.

Control Room
Currently unavailable. This place is known to house the server nuking console for triggering the Server Nuke event. It has been theorized that the control room is only activated upon doing the full 3-day route, which has yet to happen, as the only "legitimate" route had to be spawned in by august due to the server crashing near the end.

Lore
While the lore is mostly unknown, the idea behind FoaTCB (Fortress of a Thousand Crystal Birds) is as follows, said by August:

"The explanation for Crystal Bird triggering is that the 12th House was so burdened overtime with Nash's use of it that it errored once at some point (72 hours) and it lead to that dream (Crystal Bird) instead of the one that Nash set the house to take her to, the different but specific steps are a representation of this because it would take a good while for all of them to occur in a timespan, together with the fact you need an server active for 3 days."

Trivia

 * On September 8th and 18th of 2022, many players somehow witnessed bombs in multiple servers go off which had large explosions and caused the surroundings to be destroyed and rusted, similar to the Airstrike Event and Mafia Bomb. A hint would appear which read "Notice: The user themeowmeowcat has chosen to nuke this server from the Crystal Bird Fortress control room." That message is a reference to some other Roblox game.
 * Leading up to its eventual discovery, there were many failed attempts at reaching the dream (8), the closest of which being within a server that had survived 68 hours before an unexpected crash. However, the owner of the game, August, gave the group of theorists within that server a second chance. They were given 5 guesses to assume what the last step they were missing was, and in turn August would spawn the dream in a VIP server. After one wrong answer, Discord user 'ThisB0t' and 'TheVibeDealer' guessed that the missing step was to buy every level of the PSY Backpack Display, which turned out to be correct. So, on September 18th of 2023 at 12:11 AM (UTC), one year after the second Server Nuke, the group entered the dream for the very first time.
 * The group who made this possible are as follows: snowlyre, VSTnex, AmaneActuallyExist, Techley125, usnemdy, infestedmite64, IrritatingGolem, UncoockedSeven, Aaskvarii, calinus34, Denis_wgf2Alt, DracoUnrealMaster, geometry_squared, Inviral, lol191k, issac64dxxx, itsyoboiwithpasta, Joshibin, kitfungus, Lament, LycoRecording, powerrangerman170, ripatorium, Set, nikita12345man, TheVibeDealer, TheShovelKnight, ThisB0t, oppedprime1112, killerstar6666, mlg_lmg2, Torreleon234, Bop (This list may be inaccurate)
 * The name of this dream may have come from a joke said in the Epic Department Discord server by Coidiest on December 19, 2021.
 * The effect used in the skybox of this dream (rotating Void Stars) can also be seen here.
 * The netted racecars obtained from the PSY scroll upgrade can be duplicated.