Most played cards in Rogue:

12 Decks
Ancient Tomb
39 copies - 3.25 average
Lotus Petal
24 copies - 2 average
City of Traitors
21 copies - 1.75 average
Chrome Mox
19 copies - 1.58 average
Swords to Plowshares
18 copies - 1.5 average
Force of Will
16 copies - 1.33 average
Chalice of the Void
14 copies - 1.17 average
Urza's Saga
13 copies - 1.08 average
White Plume Adventurer
12 copies - 1 average
Mox Opal
12 copies - 1 average
Flooded Strand
12 copies - 1 average
Brainstorm
12 copies - 1 average
Seasoned Dungeoneer
12 copies - 1 average
Ponder
12 copies - 1 average
Archon of Emeria
11 copies - 0.92 average
Cavern of Souls
10 copies - 0.83 average
Wasteland
10 copies - 0.83 average
Containment Priest
9 copies - 0.75 average
Faerie Macabre
9 copies - 0.75 average
Thalia, Guardian of Thraben
8 copies - 0.67 average