Cheapest priced copy (Aether Revolt): $0.49 at Card Kingdom, near mint, their price list as of .
Quicksmith Spy 
Creature — Human Artificer · 2/3 · Rare · Aether Revolt · #41
When this creature enters, target artifact you control gains "{T}: Draw a card" for as long as you control this creature.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
2 printings · $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Aether Revolt | 41 | Rare | $0.49 | $0.49 |
| Aether Revolt Promos | 41s | Rare | — | $0.49 |
4 rulings from Wizards of the Coast
- 9 February 2017If Quicksmith Spy leaves the battlefield, you no longer control it.
- 9 February 2017If another player gains control of Quicksmith Spy, the artifact will no longer have the card-drawing ability, even if you regain control of Quicksmith Spy.
- 9 February 2017If Quicksmith Spy or the artifact leaves the battlefield while the card-drawing ability is on the stack, that ability resolves as normal.
- 9 February 2017If Quicksmith Spy leaves the battlefield while its ability is on the stack, the artifact never gains the card-drawing ability.