Most played cards in 4c Delver:

2 Decks
Daze
8 copies – 4 avg
Force of Will
8 copies – 4 avg
Questing Druid
8 copies – 4 avg
Orcish Bowmasters
8 copies – 4 avg
Lightning Bolt
8 copies – 4 avg
Dragon's Rage Channeler
8 copies – 4 avg
Volcanic Island
8 copies – 4 avg
Polluted Delta
8 copies – 4 avg
Brainstorm
8 copies – 4 avg
Ponder
8 copies – 4 avg
Wasteland
6 copies – 3 avg
Murktide Regent
6 copies – 3 avg
Pyroblast
6 copies – 3 avg
Mishra's Bauble
6 copies – 3 avg
Scalding Tarn
6 copies – 3 avg
Counterbalance
4 copies – 2 avg
Force of Negation
4 copies – 2 avg
Surgical Extraction
4 copies – 2 avg
Lórien Revealed
4 copies – 2 avg
Meltdown
4 copies – 2 avg