The problem the Abyss faces is that black decks that would want it aren't hurting for powerful 4 drops. In general I prefer Smokestack, Braids, or Nether Void to the Abyss, and there's only so many 4 drops you need.
It's not that it isn't good enough, it's that there are other things that are better.
The Abyss is more for the artifact deck imo.
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