Best to stick to iconic cards here, with a few props on hand to help, spaghetti for an Emrakul
The price explosion since 2020 has transformed the market

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For MTG, hypergeometric is the correct model because the composition of your deck changes with every card drawn
You can also use "OP11-092 Helmeppo" to temporarily play Koby from your trash, allowing you to activate its potent [On Play] and [When Attacking] effects multiple times