Most played cards in Karn:

2 Decks
 ↓ Karn, the Great Creator
8 copies – 4 avg
↓ Chalice of the Void
8 copies – 4 avg
↓ Ancient Tomb
8 copies – 4 avg
↓ Walking Ballista
5 copies – 2.5 avg
↓ Thought-Knot Seer
4 copies – 2 avg
↓ Cloudpost
4 copies – 2 avg
↓ Planar Nexus
4 copies – 2 avg
↓ Urza's Saga
4 copies – 2 avg
↓ Kozilek's Command
4 copies – 2 avg
↓ Auriok Salvagers
4 copies – 2 avg
↓ City of Traitors
4 copies – 2 avg
↓ Cavern of Souls
4 copies – 2 avg
↓ Leyline of the Void
4 copies – 2 avg
↓ Force of Will
4 copies – 2 avg
↓ Urza's Tower
4 copies – 2 avg
↓ Lotus Petal
4 copies – 2 avg
↓ Lion's Eye Diamond
4 copies – 2 avg
↓ Stock Up
4 copies – 2 avg
↓ The One Ring
4 copies – 2 avg
↓ Spatial Contortion
3 copies – 1.5 avg