Most played cards in Tron:

2 Decks
 ↓ Ancient Stirrings
8 copies – 4 avg
↓ Karn Liberated
8 copies – 4 avg
↓ Urza's Tower
8 copies – 4 avg
↓ Urza's Power Plant
8 copies – 4 avg
↓ Chromatic Sphere
8 copies – 4 avg
↓ Sylvan Scrying
8 copies – 4 avg
↓ Urza's Mine
8 copies – 4 avg
↓ Expedition Map
8 copies – 4 avg
↓ Chromatic Star
8 copies – 4 avg
↓ Nature's Claim
7 copies – 3.5 avg
↓ Thragtusk
6 copies – 3 avg
↓ Oblivion Stone
6 copies – 3 avg
↓ Wurmcoil Engine
6 copies – 3 avg
↓ Relic of Progenitus
5 copies – 2.5 avg
↓ Thought-Knot Seer
5 copies – 2.5 avg
↓ Surgical Extraction
5 copies – 2.5 avg
↓ Ugin, the Spirit Dragon
4 copies – 2 avg
↓ Ulamog, the Ceaseless Hunger
4 copies – 2 avg
↓ Dismember
4 copies – 2 avg
↓ Walking Ballista
3 copies – 1.5 avg