Lair of Despair unlocks in Dimension 2 after reaching level 100. This is the only place you can acquire mythic quality equipment.
The Lair of Despair is first available in the Dimension 2, and can be accessed by talking to Fabulo, who flies in a yellow jacket while fanning himself above the portal gate.
There is an extended dialog when the ghost first appears, thereafter he waits as an optional dungeon element.
The dungeons progress through the 100 levels; however, the adversaries are set up to be the inverse of some of the standard monsters and this has different backgrounds than the standard dungeon. The monsters are tougher than their normal counterparts. The treasure in the boss chests appears to be standard. Like the normal dungeons, you must progress starting from level 1, but after that, you will be able to warp to the start of up to the highest set of floors that you unlocked (e.g. 1, 11, 21, etc...). However, unlike the main dungeon, you must use Essence to warp to a specific floor instead of Gold.
Any images posted to this article showing the adversaries described, are owned by the copyright holders of the Soda Dungeon game, and the images have not been edited in any way other than cropping them to a reasonable size to show the particular adversary identified in the image name. Names and pictures of encountered enemies can be seen in the game by going to the Bestiary and tapping the picture of the monster it's the counterpart of. An asterik next to an enemy's name in the Bestiary means you have encountered its Lair of Despair counterpart. Additionally, all enemies have all the same attacks and skills as their main game counterparts rather than ones of their own, with the exception of Fabulo.