pokemon sun and moon guardians rising booster pack Pokémon TCG: & Moon: The cards offer a variety of characters and strategies that enhance the gaming experience and expand the collection 1/2*Sun & Moon—Guardians Rising Booster

You can use it against opponents with no creatures and you can also use it against an opposing Turn 1 Cryptbreaker from your opponent

Collector tip: Signed editions are vulnerable to tampering and condition issues always verify authentication and choose encapsulated copies if possible

A three-mana combat trick is a big ask, but this will make a huge difference in a race, and because it cantrips, is going to slot nicely into the UB draw-two archetype.

As for why Pokemon TCG Online is being shut down, the following explanation was offered

Since Toxrill, the Corrosive can spit out a lot of Slugs, it can help you draw a lot as well