Most played cards in MUD:

1 Decks
Lodestone Golem
4 copies - 4 average
Coretapper
4 copies - 4 average
Ancient Stirrings
4 copies - 4 average
Astral Cornucopia
4 copies - 4 average
Everflowing Chalice
4 copies - 4 average
Chalice of the Void
4 copies - 4 average
Zhalfirin Void
3 copies - 3 average
Kuldotha Forgemaster
3 copies - 3 average
Darksteel Citadel
3 copies - 3 average
Sorcerous Spyglass
2 copies - 2 average
Lightning Greaves
2 copies - 2 average
Field of Ruin
2 copies - 2 average
Walking Ballista
2 copies - 2 average
Nature's Claim
2 copies - 2 average
Thorn of Amethyst
2 copies - 2 average
Surge Node
2 copies - 2 average
Damping Sphere
2 copies - 2 average
Karn, Scion of Urza
2 copies - 2 average
Dismember
1 copies - 1 average
Welding Jar
1 copies - 1 average