Woooooo, Grixis Control! Finally did it, make a control deck with actual control cards. We do be discarding though, so salt levels high.
Waste Not is our best card (and the centerpiece) as the value it acquires is simply mind-boggling. The Zombies are also our favorite thing to sac to our Ob Nixilis, the Adversary, who you should basically never play without using his Casualty ability. (When sequencing abilities, if you plan on -2ing, do it before you use the other Ob's +1, then you get the life)
Kroxa, Titan of Death's Hunger is our best finisher because it also forces them to discard in the early game, or at the very least acts as a lightning bolt. Then in endgame we can Escape him and clean up whatever is left of the opponent.
Narset, Parter of Veils is in here for the extra valuable Dark Deal though I'm down to wheel without her, its a lot of discard. Usually don't wheel without either Narset, Parter of Veils or a Waste Not though.
As for sideboarding; I think (hear me out) sideboarding out Thoughtseize for Collective Brutality/Duress/Despise is almost always a good idea. Narset, Parter of Veils is also pretty easy to sideboard out if needed. The End is for combo pieces/Sheoldred, the Apocolypse, Brotherhood's End if we need more wraths/they play a lot of even-CMC cards, and Dampning Sphere for Combo.
(More Budget-Friendly manabase in the maybeboard)