Most played cards in BG Rock:

1 Decks
Verdant Catacombs
4 copies - 4 average
Grim Flayer
4 copies - 4 average
Abrupt Decay
4 copies - 4 average
Thoughtseize
3 copies - 3 average
Surgical Extraction
3 copies - 3 average
Mirri's Guile
2 copies - 2 average
Elvish Reclaimer
2 copies - 2 average
Bloodstained Mire
2 copies - 2 average
Wasteland
2 copies - 2 average
Pithing Needle
2 copies - 2 average
Mutagenic Growth
2 copies - 2 average
Plague Engineer
2 copies - 2 average
Wooded Foothills
2 copies - 2 average
Collective Brutality
2 copies - 2 average
Bayou
2 copies - 2 average
Scavenging Ooze
2 copies - 2 average
Liliana, the Last Hope
2 copies - 2 average
Inquisition of Kozilek
2 copies - 2 average
Assassin's Trophy
2 copies - 2 average
Scryb Ranger
2 copies - 2 average