Haldir, Lórien Lieutenant is a rare Legendary Creature — Elf Soldier card from Tales of Middle-earth Commander (LTC), collector number 441. Current market price: $3.35 (foil $4.81), TCGplayer market prices via Scryfall.
Haldir enters with X +1/+1 counters on it. Vigilance {5}{G}: Until end of turn, other Elves you control gain vigilance and get +1/+1 for each +1/+1 counter on Haldir.