Cheapest priced copy (Warhammer 40,000 Commander): $0.35 at Card Kingdom, near mint, their price list as of .
New Horizons 
Enchantment — Aura · Common · Foundations · #557
Enchant land
When this Aura enters, put a +1/+1 counter on target creature you control.
Enchanted land has "{T}: Add two mana of any one color."
Legal inCommanderBrawlStandardPioneerModernLegacyVintagePauper
7 printings · $0.35 to $0.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Warhammer 40,000 Commander | 218 | Common | $0.35 | — |
| Warhammer 40,000 Commander | 218★ | Common | — | — |
| Foundations | 557 | Common | $0.59 | — |
| Jumpstart | 414 | Common | $0.35 | — |
| The List | XLN-198 | Common | $0.35 | — |
| War of the Spark | 168 | Common | $0.35 | $0.49 |
| Ixalan | 198 | Common | $0.35 | $0.79 |
2 rulings from Wizards of the Coast
- 3 May 2019If the land this Aura would enchant is an illegal target by the time New Horizons resolves, the entire spell doesn't resolve. It won't enter the battlefield, so its ability won't trigger.
- 3 May 2019You can cast New Horizons even if you control no creatures.