Cheapest priced copy (Marvel Super Heroes): $0.35 at Card Kingdom, near mint, their price list as of .
HYDRA Infiltration 
Enchantment · Common · Marvel Super Heroes · #100
When this enchantment enters, target opponent discards two cards.
Whenever a creature you control attacks alone, target opponent loses 1 life and you gain 1 life.
Legal inCommanderBrawlStandardPioneerModernLegacyVintagePauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Marvel Super Heroes | 100 | Common | $0.35 | $0.49 |