Most played cards in UR Delver:

31 Decks
Force of Will
124 copies - 4 average
Brainstorm
124 copies - 4 average
Ponder
124 copies - 4 average
Dragon's Rage Channeler
123 copies - 3.97 average
Volcanic Island
122 copies - 3.94 average
Wasteland
120 copies - 3.87 average
Murktide Regent
113 copies - 3.65 average
Lightning Bolt
112 copies - 3.61 average
Daze
109 copies - 3.52 average
Delver of Secrets
108 copies - 3.48 average
Expressive Iteration
100 copies - 3.23 average
Pyroblast
99 copies - 3.19 average
Scalding Tarn
86 copies - 2.77 average
Mishra's Bauble
67 copies - 2.16 average
Misty Rainforest
57 copies - 1.84 average
Polluted Delta
55 copies - 1.77 average
Flooded Strand
55 copies - 1.77 average
Force of Negation
52 copies - 1.68 average
Surgical Extraction
50 copies - 1.61 average
Meltdown
39 copies - 1.26 average