This is a B/G Dredge deck that I've messed around with to meet my likings, I know there's similar decks like it but this is what I used to get 3rd place at my local FNM, losing to Jund Monsters,
looking for any feedback that will help
The point is to get as many creatures in your grave as possible to get the most effectiveness out of your Nighthowler, Jarad, Golgari Lich Lord, and to make that Nemesis of Mortals your sweet Tarmogoyf in disguise.
Grisly Salvage, Commune with the Gods, and Satyr Wayfinder are there to put your lovely creatures in the grave and to grab what you need to achieve victory.
Lotleth Troll is a nice beat stick that benefits himself and your graveyard, bestowing that Nighthowler on him will make the tears roll down your opponents face once they are dealing with a 13/12 creature that can regenerate for 1 swamp.
Herald of Torment is there to make that beefy creature having trouble getting through fly over your opponents to finish the game.
Jarad, Golgari Lich Lord will be a beast by himself most of the time but if that creature bestowed with Nighthowler just isn't getting through, you can sacrifice him to make sure it does, and with Nighthowler resolving as a creature, it's going to happen again.
Lifebane Zombie is a great card in my opinion because you can see your opponents hand, possibly rip something from their grasp, have a 3/1 with Intimidate that will go through unless they're running black, and will die easily and probably take something down with him as a chump blocker.
Deathrite Shaman is always going to be a great card in any G/B deck, it's Mana when you need it, damage when you need it, and although not recommended it's lifegain should you have to.
Shadowborn Demon will insta kill something as soon as it hits the board and now you have a 5/6 flier, and with dredge you won't have to worry about his negative downside, even if you do it's just more creatures in the grave for you.
Last but definitely not least you have your Nemesis of Mortals, your beautiful 2 drop 5/5 that can easily become a 10/10 in the same turn. This guy will be on the board almost every game you play and is definitely something your going to be searching for when your dredge.
