Cheapest priced copy (Gatecrash): $0.35 at Card Kingdom, near mint, their price list as of .
Smite 
Instant · Common · Stronghold · #17
Destroy target blocked creature.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
3 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Gatecrash | 25 | Common | $0.35 | $0.49 |
| Rise of the Eldrazi | 43 | Common | $0.35 | $0.49 |
| Stronghold | 17 | Common | $0.35 | — |
One ruling from Wizards of the Coast
- 15 June 2010A “blocked creature” is an attacking creature that has been blocked by a creature this combat, or has become blocked as the result of a spell or ability this combat. Unless the attacking creature leaves combat, it continues to be a blocked creature through the end of combat step, even if the creature or creatures that blocked it are no longer on the battlefield or have otherwise left combat by then.