Dragonscale General is a rare Creature — Human Warrior card from Fate Reforged (FRF), collector number 11. Current market price: $0.16 (foil $0.70), TCGplayer market prices via Scryfall.
At the beginning of your end step, bolster X, where X is the number of tapped creatures you control. (Choose a creature with the least toughness among creatures you control and put X +1/+1 counters on it.)