Most played cards in UR Artifacts:

1 Decks
Shrapnel Blast
4 copies - 4 average
Inventor's Apprentice
4 copies - 4 average
Ensoul Artifact
4 copies - 4 average
Ghostfire Blade
4 copies - 4 average
Disdainful Stroke
4 copies - 4 average
Smuggler's Copter
4 copies - 4 average
Ornithopter
4 copies - 4 average
Lightning Strike
4 copies - 4 average
Shivan Reef
4 copies - 4 average
Hangarback Walker
4 copies - 4 average
Darksteel Citadel
4 copies - 4 average
Spirebluff Canal
4 copies - 4 average
Pia and Kiran Nalaar
3 copies - 3 average
Smash to Smithereens
2 copies - 2 average
Thopter Spy Network
2 copies - 2 average
Roast
2 copies - 2 average
Thopter Engineer
2 copies - 2 average
Wandering Fumarole
2 copies - 2 average
Seismic Rupture
1 copies - 1 average
Savage Alliance
1 copies - 1 average