Most played cards in Canadian:

1 Decks
Misty Rainforest
4 copies – 4 avg
Daze
4 copies – 4 avg
Force of Will
4 copies – 4 avg
Wasteland
4 copies – 4 avg
Brainstorm
4 copies – 4 avg
Delver of Secrets
4 copies – 4 avg
Scalding Tarn
4 copies – 4 avg
Ponder
4 copies – 4 avg
Stifle
4 copies – 4 avg
Lightning Bolt
4 copies – 4 avg
Pyroblast
4 copies – 4 avg
Murktide Regent
3 copies – 3 avg
Tarmogoyf
3 copies – 3 avg
Minor Misstep
3 copies – 3 avg
Volcanic Island
3 copies – 3 avg
Tropical Island
3 copies – 3 avg
Brazen Borrower
2 copies – 2 avg
Force of Negation
2 copies – 2 avg
True-Name Nemesis
2 copies – 2 avg
Surgical Extraction
2 copies – 2 avg