My entry:
https://cubecobra.com/cube/list/c580b07c-a07b-4c8c-a748-60e5c05ba674?view=spoiler
Work of the Wicked
A tool made for growing graveyards. You know, it is quite hard to design a 180 card cube with a single card being 1/6 of it, because archetypes will quickly feel very similar, when they all are supposed to be interested in 5-8 copies of the same card. But when that same card is used only to stock your graveyard, difference can be achieved by caring about what's inside the grave!
Here a quick overview of this cube's archetypes:
Creatures of the Wicked
Dead bodies, dead bodies everywhere! Black/green is quite naturally the color combination here to get as many creatures in it's graveyard as possible. You would want all the essential effects like removal, ramp and card draw on creatures too, which, luckily, you can get.
Lands of the Wicked
20+ lands is too much? Not when they are triggering your landfall payoffs, then they turn into creatues and smash, and when they die, you can get them all back (just like the dozen lands you've milled - even more triggers). I tried a lot to make sure this deck wants 20+ lands, so it's payoffs wouldn't just be as good in other decks running 16 or 17 lands.
Spells of the Wicked
The spells deck is a classic - and usually it doesn't need self mill tools like the wand to fill it's graveyard. To make sure this one wants the wand, I was very careful with adding cheap spells. Only Force Spike and Spite of Mogis, a reactive spell and one that doesn't work on turn 1, cost a single mana.
Artifacts of the Wicked
Tools can be buried too. And recurred. This is what red/white is doing in this cube. Of course it comes quite handy, that your self mill tool is an artifact as well, so I had to design this archetype with the fact in mind, that they can reach a very high percentage of the wanted type easily.
Enemies of the Wicked
One has to be the party crasher. In this case it is the white/black aggro hate deck, that exiles cards from graveyards, punishes you for playing wands and supports that with aggressive 1- and 2-drops to pressure people who durdle too much.
Those are the five main archetypes, but there are a few more things to add some spice to the drafting portion. Five three-color cards, glue cards to fight over and some very subtle allied-color support.
I hope you like it