You can find this in "Hatebears" decks (which have a lot of hateful creature cards), and even the occasional Elves list
Whenever equipped creature attacks alone, you draw a card and you lose 1 life
Other good payoffs for this strategy include Liliana, Dreadhorde General for incidental card draw, Moldervine Reclamation for lifegain, and Grave Pact for board-wide punishment
Gauntlets of Light and Magewrights Stone will probably be essential
And if you know someone thats already built a cube, give them a shout to draft it
Farming is very expensive, and between denying their loans, wide-spread discrimination from the USDA, and land taken through force, local corruption, and fractured land titles, it is a herculean feat for most Black farms to stay alive