They help further the deck-building capabilities of players around the world
Imagine combining a powerful Psychic attack from Mewtwo with a fire blast from a benched Charizard GX for a knockout punch
Pokemon TCG Marketplace SV09: Journey Together This attack also does 30 damage to 1 of your opponents Benched Pokmon
By extension, you can use cards from Standard-legal sets such as Ikoria: Lair of Behemoths and Zendikar Rising to create a semi-competitive list that can hold its own at a local event or on Magic Arena Im calling it Silverquill Clerics
10 Ratigan - Nefarious Criminal Card 216/204 EN.7, Ruby Ink The villainous rat of The Great Mouse Detective makes a grand appearance with card 216/204, "Ratigan - Nefarious Criminal." Though it is not among the most valuable from the set, its artwork by Maria Zafrilla is eye-catching and exudes both the power and evilness of the character
Products have been hard to find due to scalping, and whatever does show up is often overpriced by resellers chasing profit