The Apprentice.
The apprentice is the anti-hero, the "also ran" of the AM world, but I think there is a lot of good stuff possible there. If you include the initial finding, complications from their tenuous legal standing within the Order, the tension between 15 years of hard study with a youth's typical preoccupations (think some of the young Arthur/Merlin tales), and then the last years networking with other apprentices and entering the political arena (to one extent or another, consciously or no) to garner potential compatriots and sponsors for a new spring Covenant, and finally leading up to the Gauntlet, you could easily have more than enough material. (Some of this is touched on in HoH:Soc under the Tytalus chapter, but that's just one strongly slanted dynamic.)
This supplement would run counter to the "splat book" mentality - this does not make a wizard stronger (altho' rules for detailed apprentice generation-thru-play might), but embellishes what is admittedly the weakest character in the canon, short of a grog (and even then). It could also (if you want) resolve some of the guesswork regarding some of the more amorphous aspects of apprenticeship, things that are hinted at but not developed (and there is a small list of those).
The challenge would be to create plots and RP opportunities for an indentured servant who is usually seen as being allowed very little(?) volition. Perhaps this could introduce an expansion of the idea of a "botch", as fledgling wizards surely make a lot of mistakes, and yet as a rule neither destroy themselves, their masters nor their general environments. Perhaps an expanded list of suggested botches that result in mini-scenarios attached - the "Special/Story Event" category of the Experimentation Table.
Another problem is that it's pretty clear(?) that an apprentice cannot be run as a peer with Magi and Companions - a few spells and tricks aside, they are far less skilled in almost all areas while more vulnerable and point-detonating in any sort of challenge, be that social, political, academic or combat. They don't even have Parma (unless their Parens is sharing theirs at the moment.) So it would almost have to be run as a separate (if perhaps parallel) story line to keep the survivability and challenges proportionate - but that's not uncommon with some types of main characters anyway.
(To reach 50,000 words, it might need to also incorporate Familiars, which are a parallel discussion - I don't have a good feel for what would represent that quantity of text.)
(btw - there is a duplicate thread topic - here: https://forum.atlas-games.com/t/looking-for-nagademon-ideas/6229/1
Arbitrarily, let's continue with this one only - if only because it's longer at the time of this post.)
