Most played cards in Ninjas:

3 Decks
Ninja of the Deep Hours
12 copies - 4 average
Disrupting Shoal
12 copies - 4 average
Ornithopter
11 copies - 3.67 average
Mana Leak
11 copies - 3.67 average
Remand
11 copies - 3.67 average
Higure, the Still Wind
9 copies - 3 average
Yavimaya Coast
8 copies - 2.67 average
Repeal
8 copies - 2.67 average
Mishra's Bauble
8 copies - 2.67 average
Birds of Paradise
8 copies - 2.67 average
Erayo, Soratami Ascendant
8 copies - 2.67 average
Breeding Pool
8 copies - 2.67 average
Umezawa's Jitte
7 copies - 2.33 average
7 copies - 2.33 average
Meloku the Clouded Mirror
6 copies - 2 average
Carven Caryatid
6 copies - 2 average
Sleight of Hand
6 copies - 2 average
Hinder
4 copies - 1.33 average
Electrolyze
4 copies - 1.33 average
Shivan Reef
4 copies - 1.33 average