Most played cards in Doran Rock:

2 Decks
Kitchen Finks
8 copies - 4 average
Noble Hierarch
8 copies - 4 average
Path to Exile
8 copies - 4 average
Thoughtseize
8 copies - 4 average
Tarmogoyf
8 copies - 4 average
Maelstrom Pulse
8 copies - 4 average
Doran, the Siege Tower
8 copies - 4 average
Treetop Village
7 copies - 3.5 average
Windswept Heath
4 copies - 2 average
Ethersworn Canonist
4 copies - 2 average
Verdant Catacombs
4 copies - 2 average
Umezawa's Jitte
4 copies - 2 average
Overgrown Tomb
4 copies - 2 average
4 copies - 2 average
Tormod's Crypt
4 copies - 2 average
Loxodon Hierarch
4 copies - 2 average
Treefolk Harbinger
4 copies - 2 average
Murmuring Bosk
4 copies - 2 average
Knight of the Reliquary
4 copies - 2 average
Tidehollow Sculler
3 copies - 1.5 average