It's notorious for a few reasons, and unsurprisingly, it's the usual story of scalpers ruining it for Pokmon trainers and collectors, causing chaos to the point that the museum stopped giving out the card
[16] Estimated ungraded value: $185-$320 Estimated PSA 10 value: $3,000 Also known as Birthday Pikachu, this Black Star Promo card was distributed in North America to everyone who participated in the Create a Baby Pokmon illustration contest in 2001
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If youre interested in playing the main competitive scene in MTG Arena, the standard is the only format that youre interested in because its harder to jump into the other formats as a beginner because it requires a wider card pool thats simply too difficult for new players to attain
It does have the restriction of only triggering twice a turn, but between a decent board set up and blinking shenanigans your mileage will be high with Nadu
Its also super-interesting with a lot of different viewpoints on whats good enough