Most played cards in Grixis Pyromacer:

1 Decks
Force of Will
4 copies - 4 average
Wasteland
4 copies - 4 average
Lightning Bolt
4 copies - 4 average
Ponder
4 copies - 4 average
Volcanic Island
4 copies - 4 average
Brainstorm
4 copies - 4 average
Daze
4 copies - 4 average
Delver of Secrets
4 copies - 4 average
Misty Rainforest
3 copies - 3 average
Underground Sea
3 copies - 3 average
Dark Confidant
3 copies - 3 average
True-Name Nemesis
3 copies - 3 average
Pyroblast
3 copies - 3 average
Young Pyromancer
3 copies - 3 average
Stifle
3 copies - 3 average
Spell Pierce
3 copies - 3 average
Surgical Extraction
2 copies - 2 average
Abrade
2 copies - 2 average
Liliana's Triumph
2 copies - 2 average
Polluted Delta
2 copies - 2 average