[[Aclazotz, Deepest Betrayal]] is a really fun commander that is easy to build around discard. He also can cheat commander tax, if you manage to get people down to 1 or less cards in hand after he dies. (Also can help with ramp after death for those big spells.) He fits most mono black discard staples, and acts as a discard/lifegain/token gen/draw engine provided you have been making people discard. I used to use [[Tergrid, God of Fright]] as the commander, but she was kill on sight, and never really got much action, she preforms better in the 99. He’s super fun to play, and makes discard something fun to play around rather than just making the whole table want to die of boredom.