You can gamble on Evolving Skies packs, which are way more expensive than any other Sword and Shield pack, or you can buy them individually from card shops or other sellers
Theres always incentive to wheel and deal, and players motives shift moment to moment, rewarding those who can read the field and know how to put pressure on trading partners at exactly the right time
Cry when a card with the same name comes into your hand
Linear decks are ones that are centered around a core set of plays, the rest of the deck is designed to make that core play happen as often as possible or to maximize the advantage in game state from doing so
It discards all Energy from Umbreon ex and lets you take a Prize card outright, no matter the opponents board state
I will say though, as someone who collected a lot of Pokemon cards, I never even attempted to play the game itself