Cheapest priced copy (Duel Decks: Knights vs. Dragons): $0.35 at Card Kingdom, near mint, their price list as of .
Shiv's Embrace 
Enchantment — Aura · Uncommon · Urza's Saga · #216
Enchant creature
Enchanted creature gets +2/+2 and has flying.
{R}: Enchanted creature gets +1/+0 until end of turn.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
5 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Duel Decks: Knights vs. Dragons | 74 | Uncommon | $0.35 | — |
| Magic 2011 | 156 | Uncommon | $0.35 | $0.49 |
| Magic 2014 | 153 | Uncommon | $0.35 | $0.49 |
| The List | USG-216 | Uncommon | $0.35 | — |
| Urza's Saga | 216 | Uncommon | $0.35 | — |
2 rulings from Wizards of the Coast
- 15 August 2010Only Shiv’s Embrace’s controller (who is not necessarily the enchanted creature’s controller) can activate its activated ability.
- 15 August 2010When Shiv’s Embrace’s activated ability resolves, the creature Shiv’s Embrace is enchanting at that time will get +1/+0 (regardless of what creature Shiv’s Embrace was enchanting when the ability was activated). If Shiv’s Embrace has left the battlefield by then, the creature it was enchanting at the time it left the battlefield will get +1/+0.