Most played cards in Grenzo, Dungeon Warden:

2 Decks
Devil's Play
3 copies - 1.5 average
Entomb
2 copies - 1 average
Dismember
2 copies - 1 average
Fire Covenant
2 copies - 1 average
Insidious Dreams
2 copies - 1 average
Read the Bones
2 copies - 1 average
Faithless Looting
2 copies - 1 average
Beseech the Queen
2 copies - 1 average
Magus of the Moon
2 copies - 1 average
Mad Auntie
2 copies - 1 average
Diabolic Tutor
2 copies - 1 average
Demonic Tutor
2 copies - 1 average
Sign in Blood
2 copies - 1 average
Damnation
2 copies - 1 average
Shred Memory
2 copies - 1 average
Toxic Deluge
2 copies - 1 average
Phyrexian Arena
2 copies - 1 average
Necromancy
2 copies - 1 average
Night's Whisper
2 copies - 1 average
Dance of the Dead
2 copies - 1 average