pokemon card blastoise 2 102 PSA 7 NM Pokémon TCG Base Set Blastoise

The answer depends on how you define the rarest

That is almost certainly a PSA 9 unless the slab can hide it

When drafting, remember this limit - you most likely won't be able to use an activated ability or cast a spell from exile that costs more than five mana, or requires two or more mana of the same color

[153] In 2025, in addition to sets based on Final Fantasy and Spider-Man , all future Universes Beyond sets will be made legal to play in all formats

So I get that kind of information and then begin working on the rough drafts

Nuts and Bolts There always seems to be a bit of interest in how these lists are made (this seems like a good time to stress once again that they are based on EDHREC score, NOT my personal opinion), and people are often surprised that Im not using any special data or .json from EDHREC, but rather just muddling my way through with some Scryfall knowledge