Leyline Invocation is a common Sorcery card from Strixhaven: School of Mages (STX), collector number 136. Current market price: $0.25 (foil $0.15), 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 lands you control.