By March 2026, sealed copies trade above 120,000 680% appreciation in under five years
In general, these would be cards that do not see a lot of play in the current meta and that most of the times (but not always) belong to very old sets
Adventures were also heavily featured in Dungeons & Dragons: Battle for Baldur's Gate , and the following sets all feature at least one adventure card: Final Fantasy + Final Fantasy Commander Duskmourn Commander Bloomburrow Commander Doctor Who Fallout The Lost Caverns of Ixalan + LCI Commander Murders at Karlov Manor Unfinity Modern Horizons 3 Safe to say this is a fairly popular mechanic
Yu-Gi-Oh!: The 10 Best Beast Decks, Ranked Once per turn, you can prevent your opponent from activating a Spell or Trap during your Battle Phase
For those hardcore box breakers out there, these ratios are not guaranteed
Personally, I think the companion mechanic has the potential to be one of the most broken mechanics added to Magic in a long, long time