Improvised Arsenal 

Artifact — Equipment
Equipped creature gets +1/+0 for each artifact you control.
{4}{R}: Create a token that's a copy of this Equipment.
Equip {R}
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Cards that do something similar expected a card that isn't here?
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Cranial Plating 100%
$0.36#2363
"Equipped creature gets +1/+0 for each artifact you control."
+1 more matching line