So after a lot of experimenting and deck changes. Money spent. I have arrived at this deck to take into the next FNM. I'll post results after the event.
This is an adapted version of the Mono-black deck.
The deck works by getting one of your gods out 4th turn with full devotion, and then playing a Gray Merchant of Asphodel on the 5th turn and swinging for the win.
1 Drop -
Tormented Hero
: I like this card because it is a very aggressive 1 drop. Swinging for 2 on the second turn, and can be bestowed later in the game for a bit of extra damage.
2 Drops -
Spiteful Returned
(Creature) : I chose this because of the synergy it has with the deck and with tormented hero. The two together can swing for 5 on turn 3. (2 unblockable damage due to loss of life)
Devour Flesh : Basic removal will help you against indestructible creatures and early game removal.
Ultimate Price
/ Doom Blade : Great removal for a variety of situations.
Bile Blight
: Great against mono-blue and fast aggro decks. Will help keep the numbers down. (Also negated Experiment One's regeneration.)
3 Drops -
Nightveil Specter : Just a great card. Adds 3 devotion. Want to play this guy 3rd turn as much as possible.
Herald of Torment
(Creature) : If you don't have a specter handy drop this guy 3rd turn.
Hero's Downfall : Must have for any black deck. Save for planeswalkers if they are going to be a problem.
4 Drops -
Erebos, God of the Dead : Great god, can get full devotion when dropped on turn 4.
Mogis, God of Slaughter : Another great god, can be played most turn 4s but won't likely get devotion until turn 5.
Whip of Erebos
: Must have a black deck in standard. It's one of those too good not to use cards.
Desecration Demon : A great threat. Play them whenever possible.
Spiteful Returned
(Bestow) : Bestow him to your fully devoted god, to add 2 more damage to an already powerful attack.
5 Drops -
Herald of Torment
(Bestow) : Bestow him to a god or a Desecration Demon. For extra damage.
Gray Merchant of Asphodel : An insanly amazing common for a devotion deck. This will win you games all the time. Drop it turn 5 and swing for a quick victory.
Suggestions and Feedback are welcome. Enjoy!