Most played cards in Madness GW:

4 Decks
Swords to Plowshares
16 copies – 4 avg
Windswept Heath
16 copies – 4 avg
Wild Mongrel
16 copies – 4 avg
Arrogant Wurm
15 copies – 3.75 avg
Call of the Herd
15 copies – 3.75 avg
Tireless Tribe
15 copies – 3.75 avg
Patrol Hound
12 copies – 3 avg
Savannah Lions
12 copies – 3 avg
Brushland
12 copies – 3 avg
Mishra's Factory
12 copies – 3 avg
Basking Rootwalla
12 copies – 3 avg
Armadillo Cloak
10 copies – 2.5 avg
Tormod's Crypt
8 copies – 2 avg
Naturalize
8 copies – 2 avg
Tranquil Domain
7 copies – 1.75 avg
Roar of the Wurm
7 copies – 1.75 avg
Glory
7 copies – 1.75 avg
Mother of Runes
4 copies – 1 avg
Prismatic Strands
4 copies – 1 avg
Ray of Revelation
4 copies – 1 avg