Cheapest priced copy (Core Set 2019): $0.49 at Card Kingdom, near mint, their price list as of .
Alpine Moon 
Enchantment · Rare · The List · #M19-128
As this enchantment enters, choose a nonbasic land card name.
Lands your opponents control with the chosen name lose all land types and abilities, and they gain "{T}: Add one mana of any color."
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
3 printings · $0.49 to $2.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Core Set 2019 | 128 | Rare | $0.49 | $1.99 |
| The List | M19-128 | Rare | $0.49 | — |
| Core Set 2019 Promos | 128s | Rare | — | $2.99 |
3 rulings from Wizards of the Coast
- 13 July 2018If an affected land has an ability that causes it to enter the battlefield tapped, it will lose that ability before it applies. The same is also true of any other abilities that modify how a land enters the battlefield or apply “as” a land enters the battlefield.
- 13 July 2018Alpine Moon’s effect doesn’t affect supertypes or other card types. It won’t remove the artifact card type from an artifact land or remove the legendary supertype from a legendary land.
- 13 July 2018If an affected land has an ability that triggers “when” it enters the battlefield, it will lose that ability before it triggers.