Sunbringer's Touch is a rare Sorcery card from Dragons of Tarkir (DTK), collector number 209. Current market price: $0.11 (foil $0.20), TCGplayer market prices via Scryfall.
Bolster X, where X is the number of cards in your hand. Each creature you control with a +1/+1 counter on it gains trample until end of turn. (To bolster X, choose a creature with the least toughness among creatures you control and put X +1/+1 counters on it.)