2017-02-09 : If Quicksmith Spy leaves the battlefield while its ability is on the stack, the artifact never gains the card-drawing ability.

2017-02-09 : If Quicksmith Spy leaves the battlefield, you no longer control it.

2017-02-09 : If Quicksmith Spy or the artifact leaves the battlefield while the card-drawing ability is on the stack, that ability resolves as normal.

2017-02-09 : If 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.