Most played cards in Frenetic Encounter:

3 Decks
Frenetic Efreet
12 copies - 4 average
Lightning Bolt
12 copies - 4 average
Counterspell
12 copies - 4 average
Shivan Reef
12 copies - 4 average
Fire // Ice
11 copies - 3.67 average
Portent
10 copies - 3.33 average
Pyroblast
9 copies - 3 average
Annul
8 copies - 2.67 average
Chance Encounter
8 copies - 2.67 average
Accumulated Knowledge
8 copies - 2.67 average
Nevinyrral's Disk
7 copies - 2.33 average
Bloodstained Mire
6 copies - 2 average
Hydroblast
6 copies - 2 average
Mishra's Factory
6 copies - 2 average
Mana Leak
6 copies - 2 average
Faerie Conclave
6 copies - 2 average
Tormod's Crypt
4 copies - 1.33 average
Prohibit
4 copies - 1.33 average
Chain of Vapor
4 copies - 1.33 average
Polluted Delta
4 copies - 1.33 average