Most played cards in Artifact Control:

3 Decks
Red Elemental Blast
12 copies - 4 average
Mishra's Factory
12 copies - 4 average
Su-Chi
11 copies - 3.67 average
Volcanic Island
10 copies - 3.33 average
Mana Vault
10 copies - 3.33 average
Sage of Lat-Nam
9 copies - 3 average
Underground Sea
9 copies - 3 average
Gloom
9 copies - 3 average
Triskelion
8 copies - 2.67 average
Copy Artifact
8 copies - 2.67 average
City in a Bottle
6 copies - 2 average
Blood Moon
6 copies - 2 average
Animate Dead
6 copies - 2 average
Tetravus
5 copies - 1.67 average
Lightning Bolt
4 copies - 1.33 average
Transmute Artifact
4 copies - 1.33 average
Counterspell
4 copies - 1.33 average
The Abyss
4 copies - 1.33 average
City of Brass
4 copies - 1.33 average
Mox Sapphire
3 copies - 1 average