Most played cards in Reaimator:

1 Decks
Temple of Malice
4 copies - 4 average
Nourishing Shoal
4 copies - 4 average
Bloodstained Mire
4 copies - 4 average
Night's Whisper
4 copies - 4 average
Through the Breach
4 copies - 4 average
Goryo's Vengeance
4 copies - 4 average
Griselbrand
4 copies - 4 average
Simian Spirit Guide
4 copies - 4 average
Worldspine Wurm
4 copies - 4 average
Faithless Looting
4 copies - 4 average
Bontu's Last Reckoning
3 copies - 3 average
Leyline of Sanctity
3 copies - 3 average
Desperate Ritual
3 copies - 3 average
Cathartic Reunion
3 copies - 3 average
Chalice of the Void
2 copies - 2 average
Pact of Negation
2 copies - 2 average
Collective Brutality
2 copies - 2 average
Blackcleave Cliffs
2 copies - 2 average
Borborygmos Enraged
2 copies - 2 average
Blood Moon
2 copies - 2 average