Sight of the Scalelords is a uncommon Enchantment card from Dragons of Tarkir (DTK), collector number 207. Current market price: $0.51 (foil $4.80), TCGplayer market prices via Scryfall.
At the beginning of combat on your turn, creatures you control with toughness 4 or greater get +2/+2 and gain vigilance until end of turn.