Most played cards in Coretapper Combo:

1 Decks
Expedition Map
4 copies - 4 average
Everflowing Chalice
4 copies - 4 average
Mystic Forge
4 copies - 4 average
Urza's Mine
4 copies - 4 average
Surge Node
4 copies - 4 average
Karn, the Great Creator
4 copies - 4 average
Chalice of the Void
4 copies - 4 average
Ugin, the Ineffable
4 copies - 4 average
Astral Cornucopia
4 copies - 4 average
Coretapper
4 copies - 4 average
Urza's Tower
4 copies - 4 average
Urza's Power Plant
4 copies - 4 average
Thought-Knot Seer
3 copies - 3 average
Spatial Contortion
3 copies - 3 average
Paradox Engine
3 copies - 3 average
Walking Ballista
3 copies - 3 average
Grafdigger's Cage
2 copies - 2 average
Blast Zone
2 copies - 2 average
Liquimetal Coating
1 copies - 1 average
Witchbane Orb
1 copies - 1 average