"The Abyssal Labyrinth is a vast, multi-level cave system starting with a moss-covered stone archway. As you descend, you’ll encounter echoing halls, a fast-flowing underground river, and a glowing crystal garden. Deeper levels reveal a fungal forest, the ruins of an ancient city, and treacherous lava pools. Secret passages, enchanted pools, and ancient machines offer surprises and shortcuts. The bottom levels feature a seemingly bottomless chasm, a dark shrine filled with traps, and the fearsome dragon's lair, packed with untold riches and danger. The labyrinth is populated with a variety of creatures, from common bats and goblins to rare undead and the dragon itself."