On release, the set had some of the most inflated prices the TCG has ever seen due to how impossible it was to get a hold of, thanks to the influx of scalping that happened
Theyre a super prevalent effect and knowing what makes them stronger or weaker is a great way to rate cards
strategies, creature types, and maybe even personal flavor
Spell mastery If there are two or more instant and/or sorcery cards in your graveyard, that creature enters with two additional +1/+1 counters on it
While Pikachu's value has been all over the map, this card is finally settling into a home around the $350 range, making it one of the most expensive cards in the Sword and Shield era
Just remember to take leaks and early speculation with caution until Wizards shows the real previews, or at least a legible image of the box art