Most played cards in Mardu:

1 Decks
Badlands
4 copies - 4 average
Scrubland
4 copies - 4 average
Red Elemental Blast
4 copies - 4 average
Swords to Plowshares
4 copies - 4 average
Disenchant
4 copies - 4 average
Hypnotic Specter
4 copies - 4 average
Sedge Troll
4 copies - 4 average
Juzam Djinn
4 copies - 4 average
Lightning Bolt
3 copies - 3 average
City of Brass
3 copies - 3 average
Fellwar Stone
3 copies - 3 average
Underworld Dreams
2 copies - 2 average
Armageddon
2 copies - 2 average
Mishra's Factory
1 copies - 1 average
Library of Alexandria
1 copies - 1 average
Strip Mine
1 copies - 1 average
Chains of Mephistopheles
1 copies - 1 average
Wrath of God
1 copies - 1 average
Disrupting Scepter
1 copies - 1 average
Terror
1 copies - 1 average