I like the idea of making the keys a bit like forging. Different dungeon traits instead of boons. Maybe rewards instead of boons and more difficulty instead of defects (and then have quirks that’d be fun. Have a bouncy dungeon or something) and make it more balanced so no matter what you’ll get both defects and boons (quirks maybe optional to boost boon and defect bonuses). So there’s a sense of controllable randomness like with forging but a bit less controlled.