Black has its very own gorgon, the Venomous Hierophant
Allowing you to get value from them as a commander on the turn you play them, and it can one-shot people if you have Wound Reflection, Archfiend of Despair, or Astarion, the Decadent in play since those abilities check the life loss as they resolve
You can open traditional foil or non-foil versions in Set, Draft, and Collector Boosters
My friend built a pretty powerful list that, while not budget, could be made into one pretty easily
However, since they can be made at instant speed, depending on the stolen cards, she can largely get a lot of value out before she is taken out and is a great theft commander as a result
Its not the easiest deck to master , but if you enjoy thinking a few steps ahead, its super rewarding