When you combine discard, recursion, and these taxing or mana-limiting methods, you can create a game state where the opponents counters are either stripped from their hand or too expensive to cast
Saddle Saddle is a wonderfully flavorful mechanic that on its surface looks a lot like Crew but for creatures, and when you dive deeper you'll see that yeah, its basically Crew but for creatures
This can throw an opponent off guard with an awkward attack, which will still result in the creatures death, or a convoke spell that they were saving for later
Arceus VSTAR Secret Rare (Galarian Gallery) This is another breathtakingly beautiful card
So long as a card was printed at common at any point, it is legal in the format (excluding acorn-stamped, illegal, and banned cards)