Steeling Stance is a common Instant card from Dissension (DIS), collector number 18. Current market price: $0.07 (foil $0.47), TCGplayer market prices via Scryfall.
Creatures you control get +1/+1 until end of turn. Forecast — {W}, Reveal this card from your hand: Target creature gets +1/+1 until end of turn. (Activate only during your upkeep and only once each turn.)