Most played cards in 12 Post:

2 Decks
 ↓ Urza's Tower
8 copies – 4 avg
↓ Cloudpost
8 copies – 4 avg
↓ Planar Nexus
8 copies – 4 avg
↓ Stock Up
8 copies – 4 avg
↓ The One Ring
8 copies – 4 avg
↓ Karn, the Great Creator
7 copies – 3.5 avg
↓ Glimmerpost
6 copies – 3 avg
↓ Disruptor Flute
5 copies – 2.5 avg
↓ Ugin, Eye of the Storms
4 copies – 2 avg
↓ Kozilek's Command
4 copies – 2 avg
↓ Crop Rotation
4 copies – 2 avg
↓ Expedition Map
4 copies – 2 avg
↓ Force of Will
4 copies – 2 avg
↓ Inquisition of Kozilek
4 copies – 2 avg
↓ Surgical Extraction
3 copies – 1.5 avg
↓ Tishana's Tidebinder
3 copies – 1.5 avg
↓ Thundertrap Trainer
3 copies – 1.5 avg
↓ Chromatic Sphere
3 copies – 1.5 avg
↓ Veil of Summer
3 copies – 1.5 avg
↓ Yavimaya, Cradle of Growth
2 copies – 1 avg