Most played cards in Grixis Tinker:

2 Decks
Volcanic Island
8 copies - 4 average
Urza's Saga
8 copies - 4 average
Pyroblast
8 copies - 4 average
Force of Will
8 copies - 4 average
Ragavan, Nimble Pilferer
7 copies - 3.5 average
Polluted Delta
5 copies - 2.5 average
Lightning Bolt
4 copies - 2 average
Flusterstorm
4 copies - 2 average
Dack Fayden
4 copies - 2 average
By Force
4 copies - 2 average
Scalding Tarn
3 copies - 1.5 average
Pithing Needle
3 copies - 1.5 average
Soul-Guide Lantern
3 copies - 1.5 average
Bloodstained Mire
3 copies - 1.5 average
Leyline of the Void
3 copies - 1.5 average
Shattering Spree
3 copies - 1.5 average
Mox Sapphire
2 copies - 1 average
Badlands
2 copies - 1 average
Mox Ruby
2 copies - 1 average
Ponder
2 copies - 1 average