Cheapest priced copy (Edge of Eternities): $0.35 at Card Kingdom, near mint, their price list as of .
Diplomatic Relations 
Instant · Common · Edge of Eternities · #177
Target creature you control gets +1/+0 and gains vigilance until end of turn. It deals damage equal to its power to target creature an opponent controls.
Legal inCommanderBrawlStandardPioneerModernLegacyVintagePauper
2 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Edge of Eternities | 177 | Common | $0.35 | $0.49 |
| Edge of Eternities | 177† | Common | — | — |