Most played cards in Post Ramp:

1 Decks
Karn, the Great Creator
4 copies - 4 average
Grim Monolith
4 copies - 4 average
Ancient Tomb
4 copies - 4 average
Thought-Knot Seer
4 copies - 4 average
Cloudpost
4 copies - 4 average
Glimmerpost
4 copies - 4 average
Chalice of the Void
4 copies - 4 average
Faerie Macabre
3 copies - 3 average
Eldrazi Temple
3 copies - 3 average
Sorcerous Spyglass
3 copies - 3 average
Vesuva
3 copies - 3 average
Unlicensed Hearse
3 copies - 3 average
City of Traitors
2 copies - 2 average
Warping Wail
2 copies - 2 average
Ugin, the Ineffable
2 copies - 2 average
Thran Dynamo
2 copies - 2 average
Golos, Tireless Pilgrim
2 copies - 2 average
Ulamog, the Ceaseless Hunger
2 copies - 2 average
Trinisphere
2 copies - 2 average
Manifold Key
2 copies - 2 average