Most played cards in Doran Rock:

6 Decks
Verdant Catacombs
24 copies - 4 average
Thoughtseize
24 copies - 4 average
Tarmogoyf
24 copies - 4 average
Doran, the Siege Tower
23 copies - 3.83 average
Maelstrom Pulse
22 copies - 3.67 average
Treefolk Harbinger
22 copies - 3.67 average
Treetop Village
21 copies - 3.5 average
Murmuring Bosk
19 copies - 3.17 average
Knight of the Reliquary
18 copies - 3 average
Noble Hierarch
16 copies - 2.67 average
Misty Rainforest
15 copies - 2.5 average
12 copies - 2 average
Elspeth, Knight-Errant
12 copies - 2 average
Kitchen Finks
12 copies - 2 average
Zealous Persecution
11 copies - 1.83 average
Reveillark
10 copies - 1.67 average
Leyline of the Void
10 copies - 1.67 average
Duress
9 copies - 1.5 average
Path to Exile
9 copies - 1.5 average
Putrid Leech
8 copies - 1.33 average