Grindy's Infinit Donjon

In a dingy back ally in a run down section of Lower City, there is a building that appears to be abandoned with some words broadly slapped across the facade in scratchy black paint: "Grindy's Infinit Donjon." The front doors are unlocked.

Inside, the smell of mold and wood rot is permeating, and it appears the ceiling has collapsed, leaving debris covering the floor. There is what looks like the opening to a mine shaft rising out of the center of the open first floor. In front of the opening is a 12-foot circle of runes written in white chalk. The opening is dark inside, and what lies beyond cannot be seen without getting close.

Should a light be shined into the hole, Grindy appears in the room, as if by magic! He is a cackling old goblin dressed to the nines in a fine gold-trimmed doublet. He's wearing oversized gold rings with a different gem set on each finger, multiple amulets socketed with gems, and has his large ears covered with gold rings and studded gems. It's safe to say he's a fan of gems.

Grindy offers a stately bow and welcomes visitors to his ''Infinite Donjon. ''His voice is chirpy and full of laughter, and he keeps a large grin on his face. Strangely, his pointed goblin-teeth appear to be perfectly white, and perfectly aligned. This is extremely unusual for goblins.

How it Works
For 100gp each, player characters may enter the dungeon, and test their skills against a series of dungeons that never ends!

Grindy hands each player who pays up a small stone sculpture of himself; they appear to be made of the same green-tinted stone as the buildings of Riverguard. He calls it a "calling stone." Each stone can be used to transport one player back to the circle at the entrance.

When players enter, they find themselves in a sprawling dungeon created randomly by the DM. The dungeon can have any kind of layout, type, puzzles, traps, and foes. What's common among all the random dungeons is that they have two things to find: The Resplendent Chest represents the only loot to be had in the dungeon. PCs can kill 100 monsters and then take the exit, but if they do not find the chest, the only usable thing they will get is experience.
 * 1) A Resplendent Chest filled level-appropriate randomly rolled loot.
 * 2) A set of stairs that leads down to the next dungeon.

The dungeons remain saved until either they are cleared, or players pay Grindy double to come up with a new one for them. If they leave an uncleared dungeon and reenter, the chest will not repopulate.

Grindy ensures that all paying customers have a fair shot at facing a dungeon of balanced difficulty. Those who sneak in without paying him get no such guarantee. They also won't have the calling stone plan B to fall back on.