There are 5 different decks for Commander 2016. You will be sent one at random unless otherwise specified, subject to availability.
The decks are:
Breed Lethality - Green/White/Blue/Black
Entropic Uprising - Blue/Black/Red/Green
Invent Superiority - White/Blue/Black/Red
Open Hostility - Black/Red/Green/White
Stalwart Unity - Red/Green/White/Blue