Most played cards in Monoblack:

1 Decks
Mishra's Factory
4 copies - 4 average
Dark Ritual
4 copies - 4 average
Hypnotic Specter
4 copies - 4 average
Knight of Stromgald
4 copies - 4 average
Nantuko Shade
4 copies - 4 average
Duress
4 copies - 4 average
Withered Wretch
3 copies - 3 average
Masticore
3 copies - 3 average
Engineered Plague
3 copies - 3 average
Phyrexian Negator
3 copies - 3 average
Wasteland
3 copies - 3 average
Phyrexian Arena
3 copies - 3 average
Dystopia
3 copies - 3 average
Unmask
2 copies - 2 average
Smother
2 copies - 2 average
Contagion
2 copies - 2 average
Drain Life
2 copies - 2 average
Diabolic Edict
2 copies - 2 average
Braids, Cabal Minion
1 copies - 1 average
Skeletal Scrying
1 copies - 1 average