I have a powerless version of BG Void. I don't use Petal / Diamond / Chrome because it is not good for this deck. Petal is good only in 1st hand and mox will be destroyed by Deed.

I would never use Chainer's Edicts in BG. Instant speed of Diabolic Edict is a huge difference. I used ChE in SB monoB version because I already had 3 Diabolic Edicts MD. What is the best use for Chainers Edict ? Maybe vs. Tog... Hunted Wumpus said something interesting - about using Dark Rituals in mid game. I found myself recently angry when I draw them in mid game but they are fundaments of speed and ability to blow Deed. Using them for Chainers would be good but would you dare to replace instant edicts with sorcery edicts ?

In my meta there is so much aggro now. I hate losing games vs. stupid sligh 14 years player but this is t1. Anyone could have godly draw. I still use Mishra's because they are so good vs. small creatures. I use 3 of them because 2 would be too random and 4 would be too much. What do you think? I have to say that I use only 3 Deeds because they are dead vs. creatureless control decks.

I have been trying to create a mono black version of Nether Void but it is extremely hard to do. Now I'm testing all constructions with green to find my way.

In MonoB I used 5 Strip effects and it was still not enough. I think that 4x Wasteland is a must. I tested 1 Dustbowl in place of 4th Wasteland and this card is very risky. During one day of playtesting in #magic-league where almost everyone use the same decks from win column (Stax, Grow, Dragon and Tog) I played 40 matches (92 games). This single Dust Bowl alone won for me 10 games and also was very useful in other 14 games. The other fact is that in 17 cases if it was 4th Wasteland it would change everything. Now when I'm testing Void with green I think that there is no place for such toys. BG Void is more mana hungry than MonoB.

Using Skeletal Scrying depends of you meta. In real life around me there is so much Sligh and other beatdown decks that I cannot use them and mighty Necropotence