Most played cards in Rakdos Control:

2 Decks
Strangling Soot
8 copies - 4 average
Damnation
8 copies - 4 average
Prismatic Lens
8 copies - 4 average
Molten Slagheap
7 copies - 3.5 average
Void
6 copies - 3 average
Wildfire Emissary
6 copies - 3 average
Twisted Abomination
6 copies - 3 average
Enslave
6 copies - 3 average
Phyrexian Totem
5 copies - 2.5 average
Akroma, Angel of Fury
4 copies - 2 average
Ancient Grudge
4 copies - 2 average
Dead // Gone
4 copies - 2 average
Sudden Death
4 copies - 2 average
Tendrils of Corruption
4 copies - 2 average
Dodecapod
4 copies - 2 average
Aetherflame Wall
4 copies - 2 average
Mindstab
4 copies - 2 average
Sedge Sliver
4 copies - 2 average
Stupor
4 copies - 2 average
3 copies - 1.5 average