Most played cards in Rector Trix:

3 Decks
Academy Rector
12 copies - 4 average
Cabal Therapy
12 copies - 4 average
Underground Sea
11 copies - 3.67 average
Force of Will
11 copies - 3.67 average
Flooded Strand
9 copies - 3 average
Brainstorm
8 copies - 2.67 average
Duress
8 copies - 2.67 average
Illusions of Grandeur
7 copies - 2.33 average
Tundra
6 copies - 2 average
Hurkyl's Recall
5 copies - 1.67 average
Polluted Delta
4 copies - 1.33 average
Null Rod
4 copies - 1.33 average
Phyrexian Negator
4 copies - 1.33 average
Scrubland
4 copies - 1.33 average
Donate
4 copies - 1.33 average
Misdirection
4 copies - 1.33 average
Seal of Cleansing
3 copies - 1 average
Sol Ring
3 copies - 1 average
Show and Tell
3 copies - 1 average
Form of the Dragon
3 copies - 1 average