Genju of the Spires is a uncommon Enchantment — Aura card from Betrayers of Kamigawa (BOK), collector number 105. Current market price: $0.30 (foil $0.30), 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.