Fangorn, Tree Shepherd is a rare Legendary Creature — Treefolk card from The Lord of the Rings: Tales of Middle-earth (LTR), collector number 415. Current market price: $0.63 (foil $1.07), TCGplayer market prices via Scryfall.
Treefolk you control have vigilance. Whenever one or more Treefolk you control attack, add twice that much {G}. You don't lose unspent green mana as steps and phases end.
All The Lord of the Rings: Tales of Middle-earth cards and prices