Radiant's Dragoons is a uncommon Creature — Human Soldier card from Urza's Legacy (ULG), collector number 21. Current market price: $0.17 (foil $4.28), TCGplayer market prices via Scryfall.
Echo {3}{W} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.) When this creature enters, you gain 5 life.