Most played cards in Hapatra, Vizier of Poisons:

2 Decks
Collective Brutality
2 copies - 1 average
Assassin's Trophy
2 copies - 1 average
Abrupt Decay
2 copies - 1 average
Young Wolf
2 copies - 1 average
Crop Rotation
2 copies - 1 average
Duress
2 copies - 1 average
Despise
2 copies - 1 average
Demonic Tutor
2 copies - 1 average
Yawgmoth, Thran Physician
2 copies - 1 average
Dismember
2 copies - 1 average
Wickerbough Elder
2 copies - 1 average
Soul Snuffers
2 copies - 1 average
Skinrender
2 copies - 1 average
Scavenging Ooze
2 copies - 1 average
Reclamation Sage
2 copies - 1 average
Strangleroot Geist
2 copies - 1 average
Tarmogoyf
2 copies - 1 average
Vorapede
2 copies - 1 average
Titania, Protector of Argoth
2 copies - 1 average
Thragtusk
2 copies - 1 average