Cheapest priced copy (Duel Decks: Venser vs. Koth): $0.35 at Card Kingdom, near mint, their price list as of .
Safe Passage 
Instant · Common · Magic 2013 · #30
Prevent all damage that would be dealt to you and creatures you control this turn.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
4 printings · $0.35 to $0.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Duel Decks: Venser vs. Koth | 29 | Common | $0.35 | — |
| Magic 2010 | 28 | Common | $0.35 | $0.49 |
| Magic 2011 | 26 | Common | $0.35 | $0.79 |
| Magic 2013 | 30 | Common | $0.35 | $0.79 |
4 rulings from Wizards of the Coast
- 1 October 2009Safe Passage will prevent damage dealt to creatures that weren’t on the battlefield at the time it resolved.
- 1 October 2009Safe Passage doesn’t prevent damage that would be dealt to planeswalkers you control.
- 1 October 2009Safe Passage prevents all damage, not just combat damage, that would be dealt to you and creatures you control this turn.
- 1 October 2009Safe Passage has no effect on damage that’s already been dealt.