Dracos Lair

Draco's Lair is one of the "secret" dungeons in the game. To enter it you need to use an Ancient Rune, which can be found in several dungeons. Use it by dragging it anywhere outside the inventory. Draco's Lair is populated by a range of dragons. It has no known upper limit in floors.

Using another Ancient Rune rune while being in Draco's Lair will bring you to the Dragon Nest.

The Dragons you will come across in Draco's Lair (properties for level 1 before first reset):

These items can be found in Draco's Lair (properties for level 0 before first reset):