These cards will be a replacement for VMAX cards which are being phased out (there are a few still arriving in Sword & Shield Brilliant Stars and it is expected that we'll continue to see the Trainer Gallery subset adapt Japan's VMAX Climax high class set in future expansions until all cards have been translated)
Common things one can do with Trainer cards are healing their pokemon, giving them a buff that increases their damage, or alters the field of battle to give one a specific advantage (like with Stadium cards)
Raw Near Mint copies have been trading in the $25 range, which is genuinely surprising given the artwork quality and the fact that Crown Zenith product is essentially gone from official retail channels at this point
Ill give you a guess as to what these decks have in common
The problem is that Vincent's Limit Break does very little without investing a ton of mana, which puts it on the weak side
I'm quite pleased with the response from the players, and I'm happy to say it's something we've greenlit eternally for future use