Oversimplify is a rare Sorcery card from Commander 2021 (C21), collector number 399. Current market price: $0.66, 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.