Most played cards in Nicol Bolas, the Ravager:

3 Decks
Disallow
3 copies - 1 average
Demonic Tutor
3 copies - 1 average
Force of Will
3 copies - 1 average
Dismember
3 copies - 1 average
Dreadbore
3 copies - 1 average
Damnation
3 copies - 1 average
Fatal Push
3 copies - 1 average
Counterspell
3 copies - 1 average
True-Name Nemesis
3 copies - 1 average
Snapcaster Mage
3 copies - 1 average
Wooded Foothills
3 copies - 1 average
Abrade
3 copies - 1 average
Anger of the Gods
3 copies - 1 average
Go for the Throat
3 copies - 1 average
Collective Brutality
3 copies - 1 average
Cryptic Command
3 copies - 1 average
Lightning Bolt
3 copies - 1 average
Chandra, Torch of Defiance
3 copies - 1 average
Toxic Deluge
3 copies - 1 average
Thoughtseize
3 copies - 1 average