Mishra's Animator

Replicate {2}{u}{b}
Artifact Soulbond (You may pair this artifact with another unpaired artifact when either enters the battlefield. They remain paired for as long as you
control both of them.)
As long as ~ is paired with another noncreature artifact, each of those artifacts is a 0/0 Construct artifact creature with "This creature gets
+1/+1 for each artifact you control."