It was only sold at the Pokemon Centers and a few licensed Pokemon retailers in Japan, in May, 2024, for a very limited time and in very limited quantity
According to the rules of the game, these gold cards fall into the Special Rare category, meaning they exist outside the normal list for each card set
Lightstall Inquisitor Theres fears that this can be bad if it tucks away a tapland, but the whole death and taxes archetype has always historically been about throwing enough pocket sand at an opponent to disrupt them, and this has an actual clock
This means you need at least three creatures in play to go mana positive
Some, like Shared Summons and Increasing Ambition, can get you two cards for the price of one, but the typical Demonic Tutors and such are just a 1-for-1 exchange
Each system uses its own criteria for assigning grades ranging from 1-10 based on various aspects like centering or corner wear