Experimental Augury is a common Instant card from Phyrexia: All Will Be One (ONE), collector number 278. Current market price: $0.95 (foil $5.67), TCGplayer market prices via Scryfall.
Look at the top three cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order. Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)