Most played cards in Walking Dead:

5 Decks
Gravecrawler
20 copies - 4 average
Cabal Therapy
20 copies - 4 average
Deathrite Shaman
18 copies - 3.6 average
Abrupt Decay
16 copies - 3.2 average
Thoughtseize
16 copies - 3.2 average
Carrion Feeder
15 copies - 3 average
Marsh Flats
15 copies - 3 average
Bloodghast
14 copies - 2.8 average
Verdant Catacombs
13 copies - 2.6 average
Badlands
13 copies - 2.6 average
Surgical Extraction
12 copies - 2.4 average
Bloodstained Mire
12 copies - 2.4 average
Goblin Bombardment
12 copies - 2.4 average
Faithless Looting
11 copies - 2.2 average
Lingering Souls
11 copies - 2.2 average
Polluted Delta
10 copies - 2 average
Tidehollow Sculler
9 copies - 1.8 average
Bayou
9 copies - 1.8 average
Lightning Bolt
8 copies - 1.6 average
Scrubland
7 copies - 1.4 average