Speaking of Red, Cast into the Fire may just be the perfect answer to Black Mage cards
Well cover four possible new cards, whos been entangled by Ursula, important lore elements, new stories told through cards and of course some wild guessing
They serve as a focal point in the official manga, second-series anime, and many video games the majority of which treat them as nigh-unstoppable forces of nature to be feared and respected
Obviously a greater playercount increases mythos drawspeed, so the usefulness goes up a bit, but in this case the chance of you personally encountering the desired target (a requirement for playing "Fool me once...") goes down dramatically, so that in of itself is a problem too
Between the tack-on effects, token doublers, and board wipes, it can be trivially easy to reach 10 treasures
I mean you're not really the target audience anyway