This deck is really simple and really really fast. You can win on turn 3 if you're lucky enough, but after playtesting it, turn 4-5 is more consistent.
This deck revolves around Anje Falkenrath, but there six secret partner commanders within the deck; Apocalypse Demon, Archfiend of Ifnir, Command the Dreadhorde, Embodiment of Agonies, Glint-Horn Buccaneer, and Psychosis Crawler. These six combine very well with Anje Falkenrath's ability to churn through your deck.
Presenting, the leader of the pack, the deck churner and madness queen herself, Anje Falkenrath: Anje Falkenrath works very simply, tap her to discard a card and draw a card, but if you discard a madness deck (which this deck is full of) she will untap, and you can do it again. Use her to just keep cycling through your deck, while also filling your graveyard with beautiful cards. (you can also use her ability at instant speed, so you can keep all of those madness cards on the stack and decide which ones you want to cast later on).
Next up, a demon that loves a full yard, and doomsday itself, Apocalypse Demon: Apocalypse Demon gets bigger the fuller your graveyard gets, so as you churn through your deck to get the good cards you want to cast, you'll also be beefing up a massive demonstrosity.
Coming from the next corner is guy who really loves to recycle, and hates creatures that aren't on his team, Archfiend of Ifnir: Archfiend of Ifnir makes so that every time you discard a card with Anje Falkenrath, you'll be permanently weakening your opponent's creatures, and as your deck churning goes on, ensue multiple one-sided board wipes, either killing your opponent's creatures as the turn is passed to you or making your opponents too scared to play their best creatures.
Here comes something no one saw coming. They have to be careful or this could seriously backfire, but here it is, Command the Dreadhorde: Command the Dreadhorde will most likely end the game for you one way or another. Either you have a massive board of creatures after churning through them all into your graveyard, with a minuscule amount of life left; or you miscalculate and kill yourself. Also, be sure to look at your opponents' graveyards as well, because you get those creatures too, but they can do a little more damage to you and possibly cause you to die.
Well, it looks like it's bring your kid to work day, because here comes Apocalypse Demon Jr., Embodiment of Agonies: Embodiment of Agonies is very similar to Apocalypse Demon, with two key differences: he'll probably come out a little smaller than big pappy, and he doesn't get bigger as more cards go into your graveyard (but he also doesn't get smaller as more cards leave your graveyard). Cast this out at when your graveyard is full of variety for half the cost of big pappy, then you can empty your graveyard as you please with cards like Empty the Catacombs with no downsides for Embodiment of Agonies.
At center stage are a couple of crowd favorites, they say his middle name is Red, and its game is Burn, Glint-Horn Buccaneer and Psychosis Crawler: Glint-Horn Buccaneer burns each opponent for 1 damage for each card you discard, and Psychosis Crawler burns them for each card you draw, which stacks fast with Anje Falkenrath. Use recursion cards like Shadow of the Grave to do it all over again, churning more cards and burning your opponents for even more damage.
Note: this is a prototype deck due to the lackluster Madness cards out there currently, but once the C19 deck lists drop I'll update this deck with some the new cards coming out to make it a little better.