Fledgling Dragon is a rare Creature — Dragon card from Judgment (JUD), collector number 90. Current market price: $0.49 (foil $8.45), TCGplayer market prices via Scryfall.
Flying Threshold — As long as there are seven or more cards in your graveyard, this creature gets +3/+3 and has "{R}: This creature gets +1/+0 until end of turn."