Location/mini-adventure set in a jungle village impoverished by a xorn eating their sole trade good — raw gemstones that emerge from a nearby volcano and flow down a river to them. Encounters scaled to accommodate parties of various levels.
This campaign will pre-sell #15 in our Places by the Way series of location modules for D&D 5E and Found by the Way series for Pathfinder (2E with 1E compatibility notes). Each can be dropped into your existing campaign world as needed (or desired, to give your party a temporary change of pace) or run as a brief stand-alone adventure. Your party will have the chance to meet interesting NPCs and finish mini-quests to help solve their problems, and perhaps acquire unique items from them. Ultimately, they have to decide whether or not to solve the locals' big problem, like proper heroes.