Chivalry isn't dead... it's undead! eh eh?.. And whoever said necrophilia was a taboo?! okay.. i'll stop there..
Come, raise an unholy deck of undead lords and minions so that they may serve, fall, and rise again.
This set up is extremely mana efficient, aggressive, and great for both early and late game control.
Summon and/or Sacrifice!
Either way your opponent is not going to want you to die... don't get me wrong, it's not exactly going to be easy to be slain either. There is a great deal of controlled sacrificing involved in this set up (Gravecrawler, Gutless Ghoul + Geth's Verdict and Grave Pact) /discarding (Putrid Imp), so to play creatures fast and tactically while having the availability of sweet abilities, such as Lifebane Zombie's etbf effect (reveal/exile) not to mention intimidate (combine that with Mikaeus, the Unhallowed with undying + Unearth for some fun etbf replay combos. There are a good amount of combinations involved in this deck, so it's fun for the whole family.
I find it easy to summon high costing creatures early on and throughout and because of cards like Entomb; one is able to grab a specific creature (such as Stillmoon Cavalier) to get a specific job done when needed, (such as gain flying, or protection) or maybe throw in Grave Titan to immediately gain an army. (he is not a zombie, which is a benefit in my opinion because some opponents have protection from zombies or can exile them) Lords like Death Baron combined with enchantments such as Quest for the Gravelord or Sadistic Glee, combined with Gutless Ghoul allow really nice bonuses and controlled sacs to negate spells/abilities/enchantments and can be put on the stack after blocking/attacking a lethal hit.
For the sideboard I threw in Strength of Lunacy as well because it fits with Putrid Imp's ability, and I tend to play a lot of friends that are white.
Undying/deathtouch/discard/summon from grave type cards make dying a lot more enjoyable. And if you're not the one sacrificing, than you can bet sooner or later your opponent is going to start sacrificing.