Quote from PhroX »Natural Balance is a card I always found to be very inconsistent. There were times when it was amazing, and there were times when I couldn't get a good use out of it. As such, I ended up cutting it, along with several other cards with similar problems (Natural Affinity, Constant Mists).
Quote from Fenrir Rex »In your current list, three cards jump out as removable/replaceable with some better instant speed interaction:
Bone Shredder is a little over priced for what you are getting, as Dark Banishing was never exactly spectacular. Even in a deck that wants to see its creatures sac themselves, you have enough redundancy there already.
Similarly Vampire Hexmage is more of a meta call. I don't tend to see planeswalkers that I can't kill with removal or combat, and that's about the only silver bullet that I have to deal with. If you don't have huge, relevant targets, you could easily make this Vraska's Contempt.
Finally, the third Sign in Blood variant doesan't tend to get as much mileage, especailly since you have Arena and Necro too. I would cut Night's whisper and grab something else from your maybeboard. (My vote goes to the Mischief, I love that card.)