Most played cards in Mono Blue:

2 Decks
 ↓ Counterspell
8 copies – 4 avg
↓ Mishra's Factory
7 copies – 3.5 avg
↓ Boomerang
5 copies – 2.5 avg
↓ Psionic Blast
5 copies – 2.5 avg
↓ Control Magic
4 copies – 2 avg
↓ Flying Men
4 copies – 2 avg
↓ Lord of Atlantis
4 copies – 2 avg
↓ Blue Elemental Blast
4 copies – 2 avg
↓ Energy Flux
4 copies – 2 avg
↓ Psychic Purge
4 copies – 2 avg
↓ Su-Chi
4 copies – 2 avg
↓ Triskelion
4 copies – 2 avg
↓ Desert
4 copies – 2 avg
↓ Copy Artifact
4 copies – 2 avg
↓ Millstone
4 copies – 2 avg
↓ Merfolk of the Pearl Trident
3 copies – 1.5 avg
↓ Phantasmal Terrain
3 copies – 1.5 avg
↓ Unsummon
3 copies – 1.5 avg
↓ Sage of Lat-Nam
3 copies – 1.5 avg
↓ Icy Manipulator
3 copies – 1.5 avg