Source: Nexus Mods (1, 2, 3, 4, 5, 6, 7, 8, 9, 10) In "TCG Card Shop Simulator," players step into the role of a trading card shop owner, managing inventory, setting prices, and organizing events to attract customers
The exact reason for this isn't 100% clear, but my theory is that when a card like Solemn Simulacrum, Sol Ring, or Cyclonic Rift gets reprinted, the very act of reprinting increases the demand for the card (apparently enough to outweigh the increase in supply)
Factor in a huge amount of legendary support cards, and a deck built around a legendary theme becomes more than viable
This Special Illustration Rare features Volcanion rampaging through a molten mountain, but it's a busy card, making it a bit hard to make out details, especially since the whole thing is a wash of red