The great thing about Academy Ruins is that you don't have to sacrifice it to use its ability, letting you repeat it over and over again
Watching a large number of videos and noting down the hits or rare cards in general is a good way to figure out approximate rarities - mainly for categories of cards, but with enough data you can infer some information about individual card rarities, though it is not always easy to tell if the information is statistically relevant or not
But until she rotates at the end of NEXT year, theres no real hope of using those spells to cheat out anything except this overtuned blunt instrument of a creature
Hyper rare
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As it is, there are plenty of cards that grant additional Extra Deck materials, even if they are not Tokens
