Other Adventurers

[MuseTraveller]

Maybe even slowly introduce a rival NPC adventurer group that eventually becomes a sideline antagonist, then full on dungeon boss wih appropriate mechanics. I love a good origin story that ends in a battle between two old friends turned enemies.

I was thinking exactly that while reading the posts. It could be a nifty way to breath new life to old dungeons. You get a rival and their party who claims they can do better than you. Maybe it's called rival roulette where you have to race to complete the dungeon before the rival party for a bonus and better rewards? It could introduce proper speed runs for old dungeons!