Most played cards in Threshold:

2 Decks
 ↓ Force of Will
8 copies – 4 avg
↓ Brainstorm
8 copies – 4 avg
↓ Meddling Mage
8 copies – 4 avg
↓ Wasteland
8 copies – 4 avg
↓ Null Rod
8 copies – 4 avg
↓ Nimble Mongoose
7 copies – 3.5 avg
↓ Stifle
7 copies – 3.5 avg
↓ Swords to Plowshares
7 copies – 3.5 avg
↓ Polluted Delta
6 copies – 3 avg
↓ Tropical Island
6 copies – 3 avg
↓ Flooded Strand
6 copies – 3 avg
↓ Tundra
6 copies – 3 avg
↓ Naturalize
6 copies – 3 avg
↓ Misdirection
4 copies – 2 avg
↓ Werebear\n1 Balance
4 copies – 2 avg
↓ Werebear\n1 Arcane Laboratory
4 copies – 2 avg
↓ Daze
4 copies – 2 avg
↓ Compost
3 copies – 1.5 avg
↓ Hydroblast
3 copies – 1.5 avg
↓ Peek
3 copies – 1.5 avg