Dwynen, Gilt-Leaf Daen is a rare Legendary Creature — Elf Warrior card from Duel Decks: Elves vs. Inventors (DDU), collector number 2. Current market price: $0.41, TCGplayer market prices via Scryfall.
Reach (This creature can block creatures with flying.) Other Elf creatures you control get +1/+1. Whenever Dwynen attacks, you gain 1 life for each attacking Elf you control.