Mirrorworks
Artifact
Whenever another nontoken artifact you control enters, you may pay 
. If you do, create a token that's a copy of that artifact.
The faces of Geth's corpse-dredgers are disturbingly similar.
John Avon
Rulings
The copiable values of the token's characteristics are the same as the copiable values of the characteristics of the artifact it's copying.
(wotc • 2011-06-01)
As the token is created, it checks the printed values of the artifact it's copying, as well as any copy effects that have been applied to it.
(wotc • 2011-06-01)
If the artifact that caused Mirrorworks's ability to trigger has already left the battlefield by the time the ability resolves, you can still pay {2}. If you do, you'll still put a token onto the battlefield. That token has the copiable values of the characteristics of that nontoken artifact as it last existed on the battlefield.
(wotc • 2011-06-01)
Each time the ability triggers, you can pay {2} only one time to get one token.
(wotc • 2011-06-01)
Printings
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Rulings
The copiable values of the token's characteristics are the same as the copiable values of the characteristics of the artifact it's copying.
(wotc • 2011-06-01)
As the token is created, it checks the printed values of the artifact it's copying, as well as any copy effects that have been applied to it.
(wotc • 2011-06-01)
If the artifact that caused Mirrorworks's ability to trigger has already left the battlefield by the time the ability resolves, you can still pay {2}. If you do, you'll still put a token onto the battlefield. That token has the copiable values of the characteristics of that nontoken artifact as it last existed on the battlefield.
(wotc • 2011-06-01)
Each time the ability triggers, you can pay {2} only one time to get one token.
(wotc • 2011-06-01)