Scale Blessing is a uncommon Instant card from Dragons of Tarkir (DTK), collector number 35. Current market price: $0.17 (foil $0.31), TCGplayer market prices via Scryfall.
Bolster 1, then put a +1/+1 counter on each creature you control with a +1/+1 counter on it. (To bolster 1, choose a creature with the least toughness among creatures you control and put a +1/+1 counter on it.)