Cheapest priced copy (Journey into Nyx): $0.35 at Card Kingdom, near mint, their price list as of .
Nyx Infusion 
Enchantment — Aura · Common · Journey into Nyx · #77
Enchant creature
Enchanted creature gets +2/+2 as long as it's an enchantment. Otherwise, it gets -2/-2.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Journey into Nyx | 77 | Common | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 26 April 2014Nyx Infusion continuously checks to see whether the creature it's enchanting is an enchantment or not. If the creature isn't an enchantment and becomes one, or it is an enchantment and stops being one, the effect will change.