Cheapest priced copy (Edge of Eternities): $0.35 at Card Kingdom, near mint, their price list as of .
Thaumaton Torpedo 
Artifact · Common · Edge of Eternities · #246
{6}, {T}, Sacrifice this artifact: Destroy target nonland permanent. This ability costs {3} less to activate if you attacked with a Spacecraft this turn.
Legal inCommanderBrawlStandardPioneerModernLegacyVintagePauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Edge of Eternities | 246 | Common | $0.35 | $0.49 |