Mewtwo V-Union (Sword and Shield Promo): This is not exactly a tech card since it forces you to build your deck in an entirely different way but if you are able to set up a Mewtwo V-UNION, you should have a very favored matchup against Lost Box all of the sudden
By tossing a coin and getting heads, you can choose one of your opponent's Pokmon energy cards and discard it
So, smaller deck, shorter games, less faffing around, and less ability to get stuck just drawing cards for multiple turns
Day 1 you'll have a choice between Traditional Sealed (Best-of-Three) and Best-of-One Sealed matches
In the end, the options are what keep this highly ranked
The deckbuilding rules are what make it so distinct and foster such incredible diversity