Toolcraft Exemplar

At the beginning of combat on your turn, if you control an artifact, Toolcraft Exemplar gets +2/+1 until end of turn. If you control three or more artifacts, it also gains first strike until end of turn.
"Just as the sound of a bell rings throughout a battlefield, so to shall the forges of Ridgol echo with the sound of the strikes of hammers and tempered steel."
-Eli, foundry warden