You might recall some older Transformer crossover cards all the way back in 2017 and 2018
Here's the formula to calculate how many more drafts you need to do to reach the Critical Point: R = Total number of Rares of that set already in your collection P = Total number of reward packs of that set already in your collection N = Number of "new" Rares you pull from a draft on average (Higher earlier, lesser later, but an average across the set is fine.) W = Average number of reward packs from doing the draft
Take the foil snow-covered land Secret Lair drop, for example: if you are on a limited budget and all you care about is having snow-covered basics for your Commander or Modern deck, you should probably just by some non-foil Modern Horizons snow-covered basics and spend the rest of your budget on more cards you need to build decks and play games with
Tip: The more hate your opponent has, the fewer actual cards they have to further their own plan
These will be found in the regular frame in Set Boosters, with extended-art versions in Collector Boosters
The problem of course is if your opponents are playing graveyard decks, you could accidentally turbo-charge their win conditions