This thing is disgusting. Not only that it's dredge, also the power level of this deck. I looked at some dredge lists and saw that they were playing cards that I thought were bad, like Putrid Imp, and Wild Mongrel. The cards themselves are fine, I just don't see the value in discarding only to discard. If all you need is a creature in grave, Cycling seems strictly better. Then I found Tortured Existence, and realized that the combos are real. I haven't taken the time to make it mathematically perfect, but the combination of Stinkweed Imp, Tortured Existence and Gurmag Angler is insane. Dump as many cards from your deck into grave as you can with Grisly Salvage, Commune with the Gods, or Satyr Wayfinder, then start dredging more and more, dumping what you dredged up back in with Tortured Existence and pulling out your Hooting Mandrills and Gurmag Anglers. If you need to dredge more cards in grave, you can bring back Street Wraith instead, cycle it, and get the Dredge trigger. Rinse and repeat for only one Black mana. Gitaxian Probe cycles like Wraith one time, but obviously lets us see our opponent's hand. We play the same way against aggro, control, combo, and other people with linear strategies, but the main purpose is spotting any grave hate in hand. Relic of Progenitus, Nihil Spellbomb, Tormod's Crypt, and Bojuka Bog could potentially ruin your day, but can all be played against with foreknowledge. Faerie Macabre wrecks our day, because only certain cards in our grave matter. If they hit dredgers out of the yard, they ended up spending zero mana to buy them two or more turns. And there's nothing that we can do about it. Luckily, nobody plays those for some reason.
Unlike other Dredge decks, mine can play the game forever without decking out, so long as I have my Battlefield Scrounger. I can dredge up Brownhide to gain life, play a card, then recycle it all, net 0. Then recycle 3 during the opponent's turn. Or, of course, just don't dredge. This also allows you to fight through a resolved Curse of the Bloody Tome, gaining 2 or more life per turn with Golgari Brownscale. It doesn't actually need to be dredged, just trade them for each other for one black, gaining 2 life every time. Teachings has literally no way to kill you. They can't mill you out, and can't drain you.