Relatively standard manaless dredge main deck.
My thoughts when creating the side board were as follows:
Dakmor Salvage, Bloodghast, and Exalted Dragon to change the style of play of the deck.
And... That's about it.
For those that are unfamiliar with the way this deck plays:
Best opening hand looks something like 1 Chancellor of the Annex (for the opening hand passive) 1 Golgari Grave-Troll 1 Phantasmagorian and all 4 Bridge from Below
Turn One:
If at all possible, you always want to play second/be on the draw, as with Dredge you need things in the graveyard in order to play the deck. The best turn one draw would be Cabal Therapy discarding Phantasmagorian on cleanup.
At the end of your opponents end-step, return Phantasmagorian to your hand, but do so that you hold priority and discard your entire hand with the exception of Chancellor of the Annex, as it's job is done and you can hold on to it and admire how you got a leg up on your opponent. How this works is: Prior to Phantasmagorian's ability resolves, because you have priority, you trigger it again.
Turn Two:
On your draw step, dredge 6 to put Golgari Grave-Troll back in your hand.
Here is where it gets a little tricky. Your perfect first dredge will look like 1 Nether Shadow 4 Prized Amalgam 1 Golgari Grave-Troll or 1 Stinkweed Imp. The reason you want the Stinkweed Imp or Golgari Grave-Troll is because those are your highest dredgers.
Dredge is an interesting mechanic as you get to choose the order in which the cards enter your graveyard. With this in mind, be sure to put the Nether Shadow in your graveyard first, and all other spells on top of it to trigger it's ability. And that's turn two.
Turn three/win:
Nether Shadow's ability will trigger, and in turn trigger the 4 Prized Amalgam.
Once again dredge 6 or 5, whichever you can. For the sake of this conversation, we're going to imagine your opponent doesn't have the slightest clue to what is going on and you got another perfect dredge 6(5). You would want 1 Balustrade Spy 1 Dread Return and 4(3) Narcomoeba. Narcomoeba will be triggered by this and just like that you have 5(4) creatures on the field! So far so good.
Sacrifice Nether Shadow to cast Cabal Therapy and name either Force of Will or Daze, as those are like the only two cards that your opponent can cast at this point that screw you.
Sacrifice 3 of your Narcomoeba (aww... sad day for a ghost jellies, but doing so will trigger your 4 Bridge from Below so you'll have like 12 2/2 zombie tokens) to cast Dread Return for Balustrade Spy and target yourself. Since you have a whopping zero lands, your entire library will be in the graveyard! (Along with the last of the Narcomoeba if you only got to drege 5... HOORAY for jellies!)
Sacrifice 3 zombie tokens to cast Dread Return bringing Flayer of the Hatebound to the battlefield, dealing 4 damage directly to your opponent... so far so good.
Sacrifise 2 zombie tokens and 1 Flayer of the Hatebound to cast your third Dread Return to bring Golgari Grave-Troll to the battlefield. Because of Flayer of the Hatebound's "Undying" ability, it will resolve on the stack prior to Golgari Grave-Troll, dealing another 5 damage.
When Golgari Grave-Troll enters the battlefield he will have like... 30 some odd +1/+1 counters due to the wonderful creature base of this deck, and then Flayer of the Hatebound's ability get's triggered... If all goes well, your opponent will have taken a grand total of 40-ish damage before you even get to your third combat phase.
For the ultra-inexperienced:
Street Wraith to "Cycle" and dredge more and maybe save one of your dredgers from a targeted spell (i.e. Surgical Extraction ect...).
If you want to play Ichorid your preferred target is Street Wraith followed by Phantasmagorian.
Graveyard hate is things like Rest in Peace, Leyline of the Void, Grafdigger's Cage, Ashiok, Dream Render and Tormod's Crypt. These are the bane of this deck's existence. One played on curve or sooner... you won't win and should just instantly concede.
That, my friends, is Manaless Dredge.
