So this is a revamp of another idea I proposed a long time ago.
The upperdark seems like a good place to put Halaster or some crazy cleric of waukeen npc. This npc entices adventurers with a legitimately good prize (probably from a modified loot table specific to this "quest"). The catch? They have to pony up an entry fee in gold. The other catch? You'll be competing against other players for this prize, thus entertaining our mad NPC.
That's the gist. It could help be a gold sink. Help players feel like they get an appropriate reward for surviving a harrowing ordeal against legitimately dangerous foes. And help those who like to battle it out with other characters, but rarely get the chance to in the normal course of play.
Ideally, we come up with a set-up that encourages the behavior we want to see with as few OOC rules as possible, but I imagine there will have to be a few to prevent abuse. Or maybe just one. . . if the dm's catch you trying to work the system unfairly, you get dealt with harshly.
I'm thinking this npc will not teleport you to his maniacal deathtrap gladitorial dungeon unless there are at least a few other players also joining (so his return on investment makes sense, of course). I would say a chest spawns in a semi-random location (essentially somewhere on one half of a map) and that chest only contains a single high level item (probably nothing worse than +3). Not an item for the whole party, should you decide to team up, but instead a single item period.
This would force players to decide if they want to try to lone wolf their way to the prize so it will for sure be theirs if they get it, or party up for better chances of survival but potentially not earning anything depending on how your team decides to handle the situation.
Players and/or teams would spawn on one half of the map. The other half would have the chest. There would only be 2 or 3 routes from one side of the map to the other, encouraging skirmishes at these choke points. Randomly spawning traps (skewed towards epic divine and mord's traps I think
To prevent flooding the server with a bunch of high quality items, the npc would only offer up the "quest" a limited number of times per day.
Thoughts?
*Edit* Thought of one other group this might help. Limited playtime folks (like me
