Dreamscape (夢のダンジョン, Yume no Danjon?), also known as Dream Dungeon and Cyan's Dream/Cyan's Soul, is a rather unique dungeon in Final Fantasy VI. It is a dream world formed from the mind of Cyan Garamonde as a reflection of his pain for the deaths of his family.
When the party returns to Doma Castle with Cyan in the party in the World of Ruin, and rests there, the Dream Stooges Laragorn, Curlax, and Moebius enter Cyan's soul. The party follows, surfacing in a dreamscape of separate areas connected by doors.
The player begins with only their third party member and must navigate the area to find their other two party members, and then once the party is reformed they can locate the Dream Stooges and battle them to leave the area. After defeating them, the party is teleported to a Phantom Train-like area, then a series of mines, both times seeing ghostly specters of Cyan being chased by other forces.
The final area of the Dreamscape is a mirror image of Doma Castle, where Elayne and Owain, Cyan's dead wife and child, urge the party to find and defeat Wrexsoul, who is feeding on Cyan's rage and despair. The player can explore Doma Castle to witness various flashbacks of Cyan's life, and Wrexsoul is located in the throne room. After dispatching Wrexsoul, Cyan is restored and achieves his peak level of skill with his Bushido training. Additionally, in the real Doma Castle, the Magicite Alexander appears in the throne room, and Cyan gains the Masamune.
The mines portion of the Dreamscape is notably the third and final time the player has access to Magitek Armor. If Terra is in the party during this segment of the game, she can use the same expanded Magitek abilities that she could use in the game's opening. Gogo can only use the Magitek commands if given the "Fight" command, since the Magitek command replaces Fight. The Dreamscape is one of a handful of areas that cannot be revisited by the player, so if the player wishes for Gau to learn the Rages of any enemies here, they must meet all the appropriate enemies during the exploration.