Birchlore Rangers is a common Creature — Elf Druid Ranger card from Onslaught (ONS), collector number 248. Current market price: $0.76 (foil $19.01), TCGplayer market prices via Scryfall.
Tap two untapped Elves you control: Add one mana of any color. Morph {G} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)