Experimental Overload is a uncommon Sorcery card from Core Set 2021 (M21), collector number 218. Current market price: $0.23 (foil $0.54), TCGplayer market prices via Scryfall.
Create an X/X blue and red Weird creature token, where X is the number of instant and sorcery cards in your graveyard. Then you may return an instant or sorcery card from your graveyard to your hand. Exile Experimental Overload.