I would suggest removing the 2 Mind Rot s you are running and replace them with Pack Rat It gives you black devotion for your Gray Merchant of Asphodel as well as provides a use cards that are dead due to match up, like doom blade against a mono black deck.

If it's within your budget i would pick up a playset of Desecration Demon and remove Deathrite Shaman a great card but with no real use here it does give you a bit of grave interaction but considering you have no way of throwing cards into you graveyard he isn't going to be played to his full potential, I would also consider taking out both Abhorrent Overlord s he is a big threat but a 7 drop when you can rally be ending the game turn 7 with a giant gray merchant if you have Sanguine Blood in play.

And lastly I would take out the Grim Return For another Underworld Connections because it gives this deck the ability to just keep deploying threats.

No budget to pick up cards. Trying to trade a buddy for a Desecration Demon or two.

I switched out Corrupt and Grim Return for another Mind Rot and another Liliana's Reaver

My theory is that Mind Rot , Duress , and Thoughtseize will feed my Deathrite Shaman and if I can get my green splash in play then his 2 life gain will deal 2 damage also with Sanguine Bond

Thoughts?

-2 Overgrown Tomb+2 Nykthos, Shrine to Nyx

Kelm, that's the plan once I get a couple more Pack Rats or Desecration Demons and the Shrine...

It's a little bit of money right now because of mono-blue and black, but I feel like your deck would really benefit from the extra devotion of Nightveil Specter . If you can get them, Erebos, God of the Dead would probably really help with the card advantage.

If you're looking for a splash other than green, I've seen impressive results at FNM with a splash of blue even just from scrylands for Far / Away , which is a really powerful card. I also think your deck would very much benefit in a budget-friendly way from a few Read the Bones . Consider pulling your Deathrite Shaman and a Mind Rot , perhaps?

Just to clarify, mainboarded Read the Bones . You have one sided, but it's really a good mainboard card. Also you might want to mainboard your Pack Rat .

Budget?

Looks really good, just Nightveil Specter would do it for you.

Budget may not be the word anymore.. but I've only bought 2 of the Pack Rat and 2 of the Desecration Demon . The rest were pack pulls or trades.

Pack Rat is good with Ogre Slumlord , but the problem is that tokens don't die and make rats.Mutavault is good with pack rats, and you can activate them to make your PRs stronger.