These are a type of Trainer Cards that you can attach to your Pokemon to give them specific advantages
Whenever Legolas deals combat damage to a player, draw a card
June 7, the day after the Standard Best-of-One qualifier, there will be a Secrets of Strixhaven Sealed Best-of-One qualifier
Recent buying behaviour hasnt been noteworthy, so its unclear why this and other Reserved List cards like Yawgmoths Will have been growing recently, aside from the obvious reason
Yup, its like they took everything that can cause a set to go crazy, and put it all into one set, right at the point when buying Pokmon cards at all has become close to impossible
So give those creatures in your hand buffs before they even see the light of battle