Cheapest priced copy (Edge of Eternities): $0.35 at Card Kingdom, near mint, their price list as of .
Eusocial Engineering 
Enchantment · Uncommon · Edge of Eternities · #181
Landfall — Whenever a land you control enters, create a 2/2 colorless Robot artifact creature token.
Warp {1}{G} (You may cast this card from your hand for its warp cost. Exile this enchantment at the beginning of the next end step, then you may cast it from exile on a later turn.)
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Edge of Eternities | 181 | Uncommon | $0.35 | $0.49 |