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Rulings
The effect of Workshop Elders's triggered ability lasts indefinitely. It doesn't wear off during the cleanup step.
If another effect later causes the artifact to become a creature and sets its power and toughness as it does so, that creature will have that base power and toughness; it won't be 0/0. Notably, crewing a Vehicle does not set its power and toughness, so a Vehicle's base power and toughness remain 0/0 if you crew it.
An artifact that becomes a creature due to Workshop Elders can't attack unless you've controlled it continuously since your turn began.
If another effect later causes the artifact to become a creature and sets its power and toughness as it does so, that creature will have that base power and toughness; it won't be 0/0. Notably, crewing a Vehicle does not set its power and toughness, so a Vehicle's base power and toughness remain 0/0 if you crew it.
An artifact that becomes a creature due to Workshop Elders can't attack unless you've controlled it continuously since your turn began.
Rulings
The effect of Workshop Elders's triggered ability lasts indefinitely. It doesn't wear off during the cleanup step.
If another effect later causes the artifact to become a creature and sets its power and toughness as it does so, that creature will have that base power and toughness; it won't be 0/0. Notably, crewing a Vehicle does not set its power and toughness, so a Vehicle's base power and toughness remain 0/0 if you crew it.
An artifact that becomes a creature due to Workshop Elders can't attack unless you've controlled it continuously since your turn began.
If another effect later causes the artifact to become a creature and sets its power and toughness as it does so, that creature will have that base power and toughness; it won't be 0/0. Notably, crewing a Vehicle does not set its power and toughness, so a Vehicle's base power and toughness remain 0/0 if you crew it.
An artifact that becomes a creature due to Workshop Elders can't attack unless you've controlled it continuously since your turn began.
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