Genju of the Spires is a uncommon Enchantment — Aura card from Masters 25 (A25), collector number 132. Current market price: $0.15 (foil $0.40), TCGplayer market prices via Scryfall.
Enchant Mountain {2}: Enchanted Mountain becomes a 6/1 red Spirit creature until end of turn. It's still a land. When enchanted Mountain is put into a graveyard, you may return this card from your graveyard to your hand.