Most played cards in Cephalid Breakfast:

3 Decks
Hermit Druid
12 copies - 4 average
Gemstone Mine
12 copies - 4 average
City of Brass
12 copies - 4 average
Cephalid Illusionist
12 copies - 4 average
Nomads en-Kor
12 copies - 4 average
Cabal Therapy
12 copies - 4 average
Eladamri's Call
10 copies - 3.33 average
Meddling Mage
9 copies - 3 average
Reanimate
9 copies - 3 average
Worldly Tutor
8 copies - 2.67 average
Duress
8 copies - 2.67 average
Exhume
8 copies - 2.67 average
Engineered Plague
7 copies - 2.33 average
Llanowar Wastes
6 copies - 2 average
Brushland
6 copies - 2 average
Yavimaya Coast
6 copies - 2 average
Absolute Law
6 copies - 2 average
Reflecting Pool
5 copies - 1.67 average
Caves of Koilos
4 copies - 1.33 average
Null Rod
4 copies - 1.33 average