Most played cards in ATS:

5 Decks
Tropical Island
20 copies – 4 avg
Survival of the Fittest
20 copies – 4 avg
Birds of Paradise
20 copies – 4 avg
Tradewind Rider
19 copies – 3.8 avg
Brainstorm
16 copies – 3.2 avg
Wall of Roots
15 copies – 3 avg
Force of Will
15 copies – 3 avg
Windswept Heath
13 copies – 2.6 avg
Savannah
13 copies – 2.6 avg
Wooded Foothills
11 copies – 2.2 avg
Eternal Witness
10 copies – 2 avg
Quirion Ranger
9 copies – 1.8 avg
Enlightened Tutor
9 copies – 1.8 avg
Taiga
9 copies – 1.8 avg
Spike Feeder
8 copies – 1.6 avg
Naturalize
7 copies – 1.4 avg
Flametongue Kavu
6 copies – 1.2 avg
Squee, Goblin Nabob
6 copies – 1.2 avg
Absolute Law
6 copies – 1.2 avg
Null Rod
6 copies – 1.2 avg