Most played cards in Rogue:

1 Decks
Remand
4 copies - 4 average
Mogg War Marshal
4 copies - 4 average
Seal of Fire
4 copies - 4 average
Steam Vents
4 copies - 4 average
Infiltrator il-Kor
4 copies - 4 average
Tarmogoyf
4 copies - 4 average
Lightning Helix
4 copies - 4 average
Perilous Research
4 copies - 4 average
Chromatic Star
4 copies - 4 average
Castigate
4 copies - 4 average
Flagstones of Trokair
4 copies - 4 average
Greater Gargadon
4 copies - 4 average
Gemstone Mine
4 copies - 4 average
Terrarion
3 copies - 3 average
Shivan Reef
3 copies - 3 average
Wrath of God
3 copies - 3 average
Honorable Passage
3 copies - 3 average
Ancient Grudge
2 copies - 2 average
Plaxmanta
2 copies - 2 average
Skarrg, the Rage Pits
2 copies - 2 average