Blufferfish is a common Creature — Fish card from Unfinity (UNF), collector number 39. Current market price: $0.20 (foil $0.08), TCGplayer market prices via Scryfall.
{3}{U}: An opponent tells you a statement about themselves and secretly notes whether it's true or false. You guess which it is. If you guessed correctly, this creature gets +2/+0 and can't be blocked this turn.