Its one of the most understated cards in the entire set, especially compared to some of the other Alternative Art Scarlet and Violet cards, but thats what makes it so desirable
For example, the Special Illustration Rare Charizard ex from Obsidian Flames (223/297) has a current market price of $54.85 in Near Mint condition according to TCGPlayer
Japan hosts a variety of tournaments, and its players have seen significant success globally
Most attacks don't require the player to discard Energy cards, although a few particularly powerful ones do
Theres also the fact that Sauron is the creator of the rings, and artifice is very much in the wheelhouse of red and blue
It caters to diverse buyers, from nostalgic collectors to retailers seeking novelty stock