Cave: Mystic
When the command words, "Mystic Challenge", is spoken, this tiny, toy-like cave will expand. In 1 turn (5 seconds) a large opening to a cave will appear.
Nothing can be seen inside the cave until one walks into it. Once inside, and after 10 turns (50 seconds), the entrance will seal off to solid rock, not allowing any others to come or go until the instance of a random encounter from a random region has been defeated.
This is highly dangerous for lower level characters, but there is no mercy with this item, with the exception of the words, "You are in danger, and have been warned", spoken by the echoing voice, suggesting retreat. This will indicate adventurers might wish to think twice about using the Mystic Cave at this point.
Once the cave is sealed, the words, "Prepare yourselves" will echo through the cave. At a random angle, one random, full encounter will emerge from the side, roof, or floor of the cave (discretion of the Game Master).
If victory is had, the mouth of the cave will open, and the defeated creature(s) will fade away, leaving treasure (roll for treasure for the creature encountered). There will always be at least one successful treasure check).
The dimensions of this cave are as follows:
Height --- : 20'
Length --- : 30'
Width ---- : 30'
Opening - : 30' at the botton, and narrowing to 20' at the top (like an alcove entrance).
Usuable: 1 / 120 days.
Value: 3 Yellow-Gold.