
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.
Body of Research has 5 printings, first in Strixhaven: School of Mages (2021). EDHREC ranks it #10,906 among Commander cards. It appears most in Primo, the Unbounded decks (1,643 on EDHREC).
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.