This deck has a lot of favourites for me: Favourite Commander (the bros), favourite colours (jund), favourite creature type (Goblin), favourite strategy (Control/reanimation/beating face)

The basic strategy of this deck is to play to the Bro's sacrificial abilities and keep the board under control, abusing death triggers, all the while swinging with oppressive beaters for the win.

I built this deck with the 70% rule in mind, so don't go suggesting all of the filthy combos available to me. However, my meta is pretty competitive so it runs just over the 70% mark if you want to build and play this deck against your meta.

Notable interactions include: Rancor + Shattergang Borthers = repeatable and cheap enchantment destruction. Doubling Season + Mycoloth = an obscene amount of counters and tokens, something this deck does a lot if generate tokens and sacrifice things. casting mycoloth while Endrek Sahr, Master Breeder Ob Nixilis, Unshackled, or Butcher of Malakir are on board is absolutely devastating.

Darksteel citadel + Tree of tales + Vault of Whispers + Great furnace + Unwinding clock = Every turn have 3-4 mana available for casting instants or using the Bro's ability also works well with Gilded Lotus or any other mana producing artifact in the library.

hammer of purphoros + crucible of worlds/loaming shaman = creatures that can be sacrificed to any one of the Bro's ability while at the same time getting your lands back into play/your library

Butcher of Malakir + Dictate of Erebos + Illusionist's Bracers = massive creature removal, with all of these on board you can make all of your opponents sacrifice 4 creatures while you only sacrifice 1

spine of ish sah + ashnod's altar/Shattergang brothers = repeatable targeted removal that helps pay for itself.

And lastly, I unfortunately figured this out after putting it in the deck, but Mikaeus, the Unhallowed + Woodfall Primus = as much non-creature permanent destruction as one wants. I don't like playing infinite combos, and I certainly don't like being a COMPLETE griefer, however I'm keeping this to deal with decks who's power level surpass my own in order to keep the game even. If I happened upon this in game with my personal playgroup I wouldn't go infinite with it.

Any ways, I hope you enjoy my list and suggestions/criticism is welcome!