Estrich (1999): "But there may be one "rare" card in a packet, a Kabutops or a Japanese Mew, that in the secondary market could go for as much as $50." "The Pokemon Craze Yields Another Parental Anxiety"
with cards like Deserted Temple and Rings of Brighthearth in combination with the aforementioned outlets can reduce the startup cost in your recipe for infinite mana, albeit quite unnecessary most of the time
As for OP03-123-charlotte-katakuri, he's a heavy hitter that synergizes with our game plan
It doesnt just improve one planeswalkerit turns that walker into a board-wide threat generator
Masked Dragon, however, improves dragon count for cards like Stamping Destruction
Graveyard recursion is also a great fit for the explore mechanic because you put some cards in your graveyards while exploring, and you can put them in your hand later in the game