Most played cards in Ruhan of the Fomori:

1 Decks
Snow-Covered Island
7 copies - 7 average
Snow-Covered Plains
4 copies - 4 average
Snow-Covered Mountain
2 copies - 2 average
Lightning Bolt
1 copies - 1 average
Lightning Helix
1 copies - 1 average
Force of Will
1 copies - 1 average
Force of Negation
1 copies - 1 average
Logic Knot
1 copies - 1 average
Mana Leak
1 copies - 1 average
Mental Misstep
1 copies - 1 average
Memory Lapse
1 copies - 1 average
Mana Tithe
1 copies - 1 average
Force Spike
1 copies - 1 average
Fiery Confluence
1 copies - 1 average
Day of Judgment
1 copies - 1 average
Cyclonic Rift
1 copies - 1 average
Cryptic Command
1 copies - 1 average
Counterspell
1 copies - 1 average
Daze
1 copies - 1 average
Disallow
1 copies - 1 average