Most played cards in Frenetic Encounter:

1 Decks
Daze
4 copies - 4 average
Polluted Delta
4 copies - 4 average
Portent
4 copies - 4 average
Counterspell
4 copies - 4 average
Frenetic Efreet
4 copies - 4 average
Lightning Bolt
4 copies - 4 average
Shivan Reef
4 copies - 4 average
Pyroblast
3 copies - 3 average
Overload
3 copies - 3 average
Blue Elemental Blast
3 copies - 3 average
Nevinyrral's Disk
3 copies - 3 average
Fire // Ice
3 copies - 3 average
Chance Encounter
2 copies - 2 average
Annul
2 copies - 2 average
Breezekeeper
2 copies - 2 average
Mishra's Factory
2 copies - 2 average
Bloodstained Mire
2 copies - 2 average
Faerie Conclave
2 copies - 2 average
Mana Leak
2 copies - 2 average
Standstill
2 copies - 2 average