Most played cards in Grixis Pyromancer:

1630 Decks
Brainstorm
6512 copies - 4 average
Force of Will
6479 copies - 3.97 average
Ponder
6469 copies - 3.97 average
Lightning Bolt
6306 copies - 3.87 average
Delver of Secrets
5932 copies - 3.64 average
Wasteland
5902 copies - 3.62 average
Daze
5898 copies - 3.62 average
Deathrite Shaman
5288 copies - 3.24 average
Gitaxian Probe
5091 copies - 3.12 average
Polluted Delta
4910 copies - 3.01 average
Young Pyromancer
4542 copies - 2.79 average
Volcanic Island
4497 copies - 2.76 average
Underground Sea
3930 copies - 2.41 average
Cabal Therapy
3742 copies - 2.3 average
Surgical Extraction
3322 copies - 2.04 average
Gurmag Angler
3308 copies - 2.03 average
Scalding Tarn
2940 copies - 1.8 average
Flooded Strand
2821 copies - 1.73 average
Pyroblast
2817 copies - 1.73 average
True-Name Nemesis
2385 copies - 1.46 average