Body of Research is a mythic Sorcery card from Strixhaven: School of Mages (STX), collector number 336. Current market price: $3.98 (foil $4.53), TCGplayer market prices via Scryfall.
Create a 0/0 green and blue Fractal creature token. Put X +1/+1 counters on it, where X is the number of cards in your library.