Most played cards in Cephalid Breakfast:

1 Decks
Eladamri's Call
4 copies - 4 average
Gemstone Mine
4 copies - 4 average
Hermit Druid
4 copies - 4 average
Nomads en-Kor
4 copies - 4 average
Worldly Tutor
4 copies - 4 average
Cephalid Illusionist
4 copies - 4 average
City of Brass
4 copies - 4 average
Cabal Therapy
4 copies - 4 average
Meddling Mage
3 copies - 3 average
Mother of Runes
3 copies - 3 average
Engineered Plague
3 copies - 3 average
Adarkar Wastes
2 copies - 2 average
Defense Grid
2 copies - 2 average
Terravore
2 copies - 2 average
Abeyance
2 copies - 2 average
Yavimaya Coast
2 copies - 2 average
Llanowar Wastes
2 copies - 2 average
Brushland
2 copies - 2 average
Duress
2 copies - 2 average
Exhume
2 copies - 2 average