Most played cards in MaskNought:

1 Decks
Stifle
4 copies - 4 average
Sinkhole
4 copies - 4 average
Phyrexian Negator
4 copies - 4 average
Underground Sea
4 copies - 4 average
Chains of Mephistopheles
4 copies - 4 average
Wasteland
4 copies - 4 average
Phyrexian Dreadnought
4 copies - 4 average
Polluted Delta
4 copies - 4 average
Hypnotic Specter
4 copies - 4 average
Duress
4 copies - 4 average
Dark Ritual
4 copies - 4 average
Illusionary Mask
4 copies - 4 average
Hymn to Tourach
3 copies - 3 average
Tormod's Crypt
2 copies - 2 average
Diabolic Edict
2 copies - 2 average
Black Lotus
1 copies - 1 average
Withered Wretch
1 copies - 1 average
Hurkyl's Recall
1 copies - 1 average
Yawgmoth's Will
1 copies - 1 average
Smother
1 copies - 1 average