Most played cards in Rakdos:

4 Decks
Lightning Bolt
12 copies - 3 average
Pyroblast
11 copies - 2.75 average
Rakdos Carnarium
11 copies - 2.75 average
Phyrexian Rager
8 copies - 2 average
Duress
8 copies - 2 average
Bloodfell Caves
8 copies - 2 average
Night's Whisper
7 copies - 1.75 average
Gurmag Angler
7 copies - 1.75 average
Electrickery
7 copies - 1.75 average
Chainer's Edict
7 copies - 1.75 average
Terminate
5 copies - 1.25 average
Flame Slash
5 copies - 1.25 average
Firebolt
5 copies - 1.25 average
Chittering Rats
4 copies - 1 average
Evolving Wilds
4 copies - 1 average
Echoing Decay
4 copies - 1 average
Stinkweed Imp
4 copies - 1 average
Blightning
4 copies - 1 average
Tortured Existence
4 copies - 1 average
Shock
4 copies - 1 average