It has only been printed once, making supply extremely limited, so it's natural that its price increases steeply based on rising demand
Many cards break into the 3-figures if they're not printed enough, like Power Artifact, and its not uncommon to get into 4, 5, and even 6-figure price ranges for the ultra-rare
In fact, I'd wager that if these packs only had gen 3-8 Pokemon, nobody but parents would care about this
The Astral set cards had abilities that could not be used in the real game without logistical nightmares, such as random effects
Which ones do you want for your Constructed and EDH decks, and which ones do you hope to play in Limited
The game features an intuitive deck-building system, allowing players to craft decks and challenge AI or other players in PvP battles