So i was playing through that legend of the sunken kingdom quest for 50 doubloons and i think that could make for a fun quest type for the Gold Hoarders, with some tweaks.
The idea is that one of the gold hoarders has lost one of their fabled keys and they need someone they trust to go find it and bring it back.
You'd start the voyage with one of those special compasses but this one isn't working quite as it should. The idea is that you have to travel to places the key has been to start empowering the compass so it can get it's "scent".
You'd be given a vague picture of an island and have to find the location that's on it, once you find the spot you'd take out the compass and hold it out, the effect for completing a riddle would play, wind rustling, mystical sounds, maybe a gem of the compass would fill with ghostly light... etc etc.
Once you've done that a few times the compass would be fixed and you'd follow it until you find where the key was taken.
As far as where the key would be... i really like the idea of it being hidden in a trapped cave much like the art of the trickster tall tale. Where you have to dodge and weave through a bevy of traps before finally picking up the key from a pedestal.
Once the key is picked up you'd have a time limit before the cave entrance is sealed and you'd have to race back through the trapped area and make it out alive with the key.
As soon as you picked up the key the voyage was completed.
Once you have the key you have a few options. You can sell it back to the gold hoarders as promised for a substantial reward. 10-50k (Considering it'd be the only reward for doing the quest... it has to be a big amount.)
Or you can take a risk and use it to open a few chests and take all the loot inside and perhaps get less than if you just sold the key.
The key would have durability and break after a certain amount of uses.
