At the beginning of your upkeep, if there are four or more creature cards in your graveyard, return a creature card at random from your graveyard to your hand.
Choose a Background (You can have a Background as a second commander.)
Fill your graveyard with creatures, then grind out the game by recurring a random creature to hand each upkeep once you hit four creatures in the yard. You pair Viconia with a Background to define your win path, dumping bodies into the bin via self-mill, sacrifice, and discard, then reusing them for value, aristocrats drain, or recursive combos.
Free, repeatable creature recursion that's hard to interact with
Mono-black gives access to the format's best tutors and reanimation
Background slot lets you tune the deck toward aristocrats, voltron, or value
Cheap 3-mana commander that comes down early and works with cheap sacrifice loops
Naturally resilient to creature removal since bodies come back
Recursion is random, so you can't reliably retrieve a specific key creature
Mono-black struggles with enchantment and artifact removal
Needs four creatures in yard to turn on, so the engine is slow early