Cheapest priced copy (Masters 25): $0.35 at Card Kingdom, near mint, their price list as of .
Genju of the Spires 
Enchantment — Aura · Uncommon · The List · #A25-132
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.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
4 printings · $0.35 to $1.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Masters 25 | 132 | Uncommon | $0.35 | $0.49 |
| Betrayers of Kamigawa | 105 | Uncommon | $0.35 | $1.99 |
| Arena League 2005 | 6 | Rare | — | $0.69 |
| The List | A25-132 | Uncommon | $0.35 | — |
One ruling from Wizards of the Coast
- 1 August 2008A noncreature permanent that turns into a creature can attack, and its {T} abilities can be activated, only if its controller has continuously controlled that permanent since the beginning of their most recent turn. It doesn't matter how long the permanent has been a creature.