Quite interesting! Its quite similar to the concept of experiences in a game ive been developing but with a awesome twist of only focusing on them and adding way more meaning then just ‘experiences’- quests, awesome! Im definetly curious to see more.
Not sure if useful or not, but my take with ‘experiences’ is to let then become ‘bonus’ when clearly applied- if not a test determines how much the character knows or not, have experience or means or assets because of that experience; Thus dealing with fairies would probably bring your faery quest to the table as all the advantage it can mean, but knowing a specific word would be a uncertain test. Hope it inspires you, im definetly interested in seeing how a game entirely around previous experiences and quests could turn up!