Cheapest priced copy (Magic 2013): $0.35 at Card Kingdom, near mint, their price list as of .
Cower in Fear 
Instant · Uncommon · Magic 2013 · #84
Creatures your opponents control get -1/-1 until end of turn.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
3 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Magic 2013 | 84 | Uncommon | $0.35 | $0.49 |
| Modern Masters 2017 | 62 | Common | $0.35 | $0.49 |
| The List | MM3-62 | Common | $0.35 | — |
One ruling from Wizards of the Coast
- 14 March 2017Cower in Fear affects only creatures your opponents control at the time it resolves. It won’t affect creatures that come under their control later in the turn.