For example, say you are enchanted by Shadow of the Second Sun and its ability triggers during your postcombat main phase
There are 138 Green and Black Insects, which gives you enough for a Commander deck but not that many options

Magic: The Gathering | Marvel's Spider-Man Key Dates Scheduled Events Prerelease : September 1925 Unlimited scheduling within the one-week Prerelease window Commander Box League : September 1925 Unlimited scheduling within the one-week Prerelease window Commander promo: Spider-Ham, Peter Porker Two-Headed Giant Commander Night : September 26November 13 One event monthly Commander promo: Spider-Ham, Peter Porker Commander Party : October 39 and October 2430 One event per period, two events per season Commander promo: Spider-Ham, Peter Porker Magic Presents: A Villainous Halloween: October 31November 2 Unlimited scheduling during the window Must have schedule by August 15 to receive event materials Spider-Man: The Final Battle : November 19 One event during the scheduling window Prize: Spider-Man alternate-art cover comic book Season-Long Events Magic Presents: Friendly Neighborhood Draft: September 26November 13 Unlimited scheduling Promo: Ultimate Green Goblin Magic Academy: Learn to Play and Deck Building: September 26November 13 Unlimited scheduling

Alexander Clamilton fights that creature
While these sets are controversial to longtime fans of the franchise, they have done a fantastic job of getting fans interested in the game, and this trend is not likely to end any time soon
Sometimes these give you actual digital cards, other times they include unique card styles, sleeves, and more