I also am intrigued by Egon's
backside other side, and I think you could just build a simple mono black mill deck with payoffs like Tormod and Tomb. The only problem I see is finishing the game out. Obviously, you could just go the big mana build, slapping in
Cabal Coffers and co. and
Exsanguinate &
Torment of Hailfire to call it a day, but that's boring to me.
What about
Necrotic Ooze combos? I'm not particularly experienced with mono black
Necrotic Ooze combos, so the only one I can think of off the top of my head is
Triskelion +
Phyrexian Devourer, and that seems a bit inconsistent.
Maybe just include a heavy reanimator package? Do a lot of self-milling,
exile irrelevant creatures with Throne of Death to draw into reanimation, then drop one of the several infinite combos black has access to?
You've definitely encouraged me to build a deck around Throne, that's for sure. I probably won't even include much of an actual win condition, either.