Most played cards in Viridian Rats:

2 Decks
Ravenous Rats
8 copies - 4 average
Aether Vial
8 copies - 4 average
Viridian Shaman
8 copies - 4 average
Llanowar Wastes
8 copies - 4 average
Nezumi Shortfang
8 copies - 4 average
Hypnotic Specter
8 copies - 4 average
Blinkmoth Nexus
8 copies - 4 average
Umezawa's Jitte
7 copies - 3.5 average
Rend Flesh
7 copies - 3.5 average
Terror
6 copies - 3 average
Chittering Rats
6 copies - 3 average
Cranial Extraction
6 copies - 3 average
Naturalize
5 copies - 2.5 average
Night's Whisper
5 copies - 2.5 average
Blackmail
4 copies - 2 average
4 copies - 2 average
Tendo Ice Bridge
4 copies - 2 average
Hideous Laughter
3 copies - 1.5 average
Sword of Light and Shadow
3 copies - 1.5 average
Nekrataal
3 copies - 1.5 average