It can spawn in one of the two watered-in nooks in Dahlgur Oasis. The cave can only be opened by helping Zaven the Alchemist fend off a few angry ghosts, after which he opens the cave and lets the player enter. This area must be explored in order to complete the achievement Nooks and Crannies.
The cave may contain a Mysterious Chest which contains the Liquid Rainbow, an item needed to enter the fabled Whimsyshire. Note that neither Zaven nor the chest are guaranteed to spawn. It may also spawn a Cursed Spire in which you have to fend off 5 waves of zombies. This is required in order to complete the Cursebreaker of Caldeum achievement.
In Adventure Mode, there is a chance "Clear the Mysterious Cave" will be one of the five Act II bounties. If so, Zaven is guaranteed to spawn.
- Resplendent Chest
- Rock Pile
- Rotting Corpse