Oversimplify is a rare Sorcery card from Secrets of Strixhaven Commander (SOC), collector number 322. Current market price: $0.24, TCGplayer market prices via Scryfall.
Exile all creatures. Each player creates a 0/0 green and blue Fractal creature token and puts a number of +1/+1 counters on it equal to the total power of creatures they controlled that were exiled this way.