When paired with cards such as Teferi's Puzzlebox that force players to discard their hands and redraw a new hand, Leovold could lock opponents out of the game, preventing them from drawing and cards and bringing the game to a screeching halt
Regardless of how the card market will behave, it is safe to say that this card will remain the most expensive one in the set
That's especially useful alongside Landfall
As an example, Emchompite says that cards that were included within Japanese sets, like the Secret Rare Yveltal EX from Best of XY, but as promos in English, are usually more expensive in Japanese just due to the nature of their release (i.e., having to pull the card from a pack vs a guaranteed promo card in a product)
I believe that when many people get together with family and friends on weekends or spend a wonderful night with their kids, playing cards must bring them a lot of joy
Swarming Instinct Decklist: Creatures (