This is a red/black/white human sacrifice burn deck with each color playing it's own specific role in how the deck operates.
White provides the humans and uses them to help control the field either by providing blockers or using Devout Chaplain to handle enchantment/artifact removal. Commander's Authority can be placed on Ravenous Demon/Archdemon of Greed to make him self-sustaining, which also acts as an automatic sacrifice outlet for the red and black. Unruly Mob will also get stronger when things die.
Black kills the humans and makes you stronger for it. Falkenrath Torturer gets more powerful every time you sacrifice a human to him, and you can do this at any time. Falkenrath Aristocrat does the same things, and is already flying and has haste so if she can appear, things get devastating.) In response, Blood Artist, Village Cannibals, and Butcher of Malakir all do their thing causing havoc on the opponent while you get stronger. Attrition also acts as a sacrifice outlet if you want to further eliminate the opposition. Remember, forcing your opponent to sacrifice gets around indestructibility.
Red does a lot of damage and also provides more humans in a pinch. Somberwald Vigilante makes for a good early blocker or even mild aggro if you're confident enough. Skirsdag Cultist also does damage on sacrifice, while Rage Thrower, who serves as your key red card, deals damage every time something dies- for any reason. You can even use him to deal damage to creatures to further impact the power of the black cards that kick in.
Lich's Tomb can serve multiple uses in this deck, either by simply making it so you can't die, or by making it very costly for your opponent to attack? What's taking X damage when it won't impact if you lose AND you then sacrifice X permanents as a result, further feeding into things like Rage Thrower, Blood Artist, or Butcher of Malakir? (Provided you've been keeping up with human token production.) However, there is only one due to the fact that it is easily possible to not need it, but it can make things more dangerous in a pinch or if you simply want to deter your opponent from attacking if you have a good position and need to keep it that way.
Do note that this deck is somewhat slow to set up and if denied any of the three key parts, the set up can fall apart. Make sure you get out your humans, make sure you can KILL your humans, and make sure your opponent suffers for it more than you do.
