The "Dark Sacrifice" deck rewards you for cleverly and mercilessly sacrificing your own Human creatures to advance your evil agenda. It's got three main parts: cards that like to sacrifice Humans, cards that reward you for sacrificing Humans, and Humans that like to be sacrificed.

What Humans want to lay down their lives? Doomed Traveler, Elgaud Inquisitor, and Mausoleum Guard each create 1/1 Spirit creature tokens with flying when they die, and the same is true of any Human equipped with Avacyn's Collar. Alternately, Elder Cathar makes one of your other creatures bigger when it dies.

What cards put your creatures on the chopping block? Skirsdag Flayer lets you sacrifice a Human (or even itself, if necessary) to destroy a creature. Altar's Reap nets you fresh cards. Falkenrath Torturer gains flying and can grow bigger. Fiend of the Shadows regenerates. Demonmail Hauberk becomes equipped to a creature, which gives that creature +4/+2—a particularly good bonus on a 1/1 flying Spirit.

What cards give you extra rewards? Village Cannibals acquires +1/+1 counters whenever any Human dies (no matter whose it is) and Unruly Mob does the same whenever any of your creatures dies (no matter what it is). Meanwhile, a steady stream of sacrifices will keep Galvanic Juggernaut rumbling into combat.

Once you get the hang of the deck, some options for customizing it include adding Ravenous Demon, which turns into a 9/9 creature with flying and trample if you feed it a Human, and Increasing Devotion, a way to get tons of delicious Human tokens. Vault of the Archangel and Sorin, Lord of Innistrad are also strong additions to any white-black creature deck.