Most played cards in Robots:

3 Decks
Triskelion
12 copies - 4 average
Tundra
12 copies - 4 average
Su-Chi
12 copies - 4 average
Copy Artifact
11 copies - 3.67 average
Disenchant
10 copies - 3.33 average
Swords to Plowshares
10 copies - 3.33 average
Blue Elemental Blast
9 copies - 3 average
Sage of Lat-Nam
8 copies - 2.67 average
Fellwar Stone
8 copies - 2.67 average
City of Brass
8 copies - 2.67 average
Juggernaut
8 copies - 2.67 average
Underground Sea
8 copies - 2.67 average
Red Elemental Blast
6 copies - 2 average
Icy Manipulator
6 copies - 2 average
Blood Moon
6 copies - 2 average
Mana Vault
5 copies - 1.67 average
Animate Dead
5 copies - 1.67 average
Badlands
4 copies - 1.33 average
Atog
4 copies - 1.33 average
Armageddon
4 copies - 1.33 average