You kill their creatures, counter their cards, and delay the game long enough until you have the ability to kill your opponent with a single card or combo
Yet, in a vacuum it still works, because the card draw worked in the natural play of the game
The feeling of representing a community of passionate people can be extremely motivating
Think about it like a 1/1 Reclamation Sage that copies itself for every additional 2 mana you spend
it is handling the buying question as an operations problem: tracked shipping from Tokyo, destination and customs details, quantity briefs, substitutions, sealed/PSA condition rules, and support before payment
That's great on its own, but Gyome also lets us pay to sac a Food token and grant a creature indestructible for the turn (at an additional cost of tapping it, like the way the troll mechanic Regenerate used to work!)