Cheapest priced copy (Marvel Super Heroes): $0.49 at Card Kingdom, near mint, their price list as of .
Alien Invasion 
Enchantment · Rare · Marvel Super Heroes · #417
At the beginning of combat on your turn, create a 1/1 red Alien creature token with haste and "This token attacks each combat if able." Put a +1/+1 counter on it for each invasion counter on this enchantment, then put an invasion counter on this enchantment.
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
2 printings · $0.49 to $0.69 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Marvel Super Heroes | 200 | Rare | $0.49 | $0.49 |
| Marvel Super Heroes | 417 | Rare | $0.69 | $0.49 |