Incremental Growth is a uncommon Sorcery card from Khans of Tarkir (KTK), collector number 138. Current market price: $0.05 (foil $0.23), TCGplayer market prices via Scryfall.
Put a +1/+1 counter on target creature, two +1/+1 counters on another target creature, and three +1/+1 counters on a third target creature.