There are so many original characters, creatures and concepts to cram in, and only so many existing cards that are a thematic fit
Notably, the Reverse Holo version of the Pikachu from Burning Shadows has also risen over the past year, and recently spiked to over $4
Sky Skiff This is a sad card in that it is just wildly outclassed by other (rarer) vehicles
As for the price discrepancy between the two art versions of the card, we see this often and I'm never quite sure if it's because people badly crave the original artwork, or if it's simply that the special treatments are more common in rare-stuffed collector boosters and therefore there are more of them on the market
Constructed staples (Manamorphose, Path to Exile, etc.) stood a decent chance at recovering until the pandemic shut down paper play, but casual cards are still selling well all over the Internet