Most played cards in BG ponza:

4 Decks
Elves of Deep Shadow
16 copies - 4 average
Bayou
16 copies - 4 average
Sinkhole
14 copies - 3.5 average
Ice Storm
12 copies - 3 average
Hypnotic Specter
12 copies - 3 average
Crumble
12 copies - 3 average
Erhnam Djinn
12 copies - 3 average
Gloom
11 copies - 2.75 average
Hymn to Tourach
10 copies - 2.5 average
Whirling Dervish
10 copies - 2.5 average
Paralyze
10 copies - 2.5 average
Pendelhaven
8 copies - 2 average
Scavenger Folk
8 copies - 2 average
Royal Assassin
8 copies - 2 average
Tranquility
7 copies - 1.75 average
Terror
7 copies - 1.75 average
Mishra's Factory
7 copies - 1.75 average
City of Brass
7 copies - 1.75 average
Dark Ritual
6 copies - 1.5 average
Sengir Vampire
6 copies - 1.5 average