Most played cards in Gruul Adventures:

1 Decks
Rimrock Knight
4 copies - 4 average
Lovestruck Beast
4 copies - 4 average
Edgewall Innkeeper
4 copies - 4 average
Stomping Ground
4 copies - 4 average
Bonecrusher Giant
4 copies - 4 average
Shifting Ceratops
3 copies - 3 average
Embercleave
3 copies - 3 average
Cindervines
3 copies - 3 average
Robber of the Rich
3 copies - 3 average
Domri's Ambush
3 copies - 3 average
Questing Beast
3 copies - 3 average
Gruul Spellbreaker
3 copies - 3 average
Fabled Passage
3 copies - 3 average
Scorching Dragonfire
2 copies - 2 average
Elder Gargaroth
2 copies - 2 average
Legion Warboss
2 copies - 2 average
Pelt Collector
2 copies - 2 average
Scavenging Ooze
2 copies - 2 average
Garruk, Unleashed
2 copies - 2 average
Heroic Intervention
1 copies - 1 average