Most played cards in Ninja:

1 Decks
 ↓ Ornithopter
4 copies – 4 avg
↓ Brainstorm
4 copies – 4 avg
↓ Prismatic Vista
4 copies – 4 avg
↓ Polluted Delta
4 copies – 4 avg
↓ Force of Will
4 copies – 4 avg
↓ Retrofitter Foundry
4 copies – 4 avg
↓ Ponder
4 copies – 4 avg
↓ Baleful Strix
4 copies – 4 avg
↓ Ingenious Infiltrator
3 copies – 3 avg
↓ Yuriko, the Tiger's Shadow
3 copies – 3 avg
↓ Force of Negation
3 copies – 3 avg
↓ Orcish Bowmasters
3 copies – 3 avg
↓ Back to Basics
2 copies – 2 avg
↓ Sheoldred's Edict
2 copies – 2 avg
↓ Snuff Out
2 copies – 2 avg
↓ Plague Engineer
2 copies – 2 avg
↓ Flusterstorm
2 copies – 2 avg
↓ Thoughtseize
2 copies – 2 avg
↓ Fatal Push
2 copies – 2 avg
↓ Underground Sea
2 copies – 2 avg