Most played cards in Intruder Alarm:

2 Decks
Enlightened Tutor
8 copies - 4 average
Adarkar Wastes
8 copies - 4 average
Shrieking Drake
8 copies - 4 average
Living Wish
8 copies - 4 average
Yavimaya Coast
8 copies - 4 average
Intruder Alarm
8 copies - 4 average
Llanowar Elves
8 copies - 4 average
Words of Wilding
8 copies - 4 average
Birds of Paradise
8 copies - 4 average
Counterspell
6 copies - 3 average
Arcanis the Omnipotent
6 copies - 3 average
Words of Wind
4 copies - 2 average
Flooded Strand
4 copies - 2 average
Prodigal Sorcerer
4 copies - 2 average
Windswept Heath
4 copies - 2 average
Opposition
2 copies - 1 average
Elephant Grass
2 copies - 1 average
Disenchant
2 copies - 1 average
Wasteland
2 copies - 1 average
Circle of Protection: Red
2 copies - 1 average