So the black cards that work with +1/+1 counters are incredibly underwhelming. I'm currently running Carrion Feeder, Sinuous Vermin, and Undying Evil, and among the available options I would re-consider Thrill-Kill Assassin or Thriving Rats if they helped support something, maybeButcher Ghoul. But those are all two drops, and Black's two-drops are full of evasive creatures for the sake of aggro/skies decks already. Most of the other things that work with +1/+1 counters are bad bad bad sac archetype cards or tribal based.
Which is really sad because I've been looking for more of an identity for Golgari beyond midrange value after finding both Spider Spawning and Worm Harvest underwhelming as graveyard enablers.
That said, I don't think I will end up running Corpsejack Menace. Which is a pity, because I really like the card. I might even end up cutting Winding Constrictor because of the lack of +1/+1 in black.
If you like graveyard decks, you can support them without going the Spider Spawning route. The self mill cards are great with flashback/threshold/delve/etc. Depending on the threshold and delve you run, coupled with the amount of bursty self mill the deck can be actually really fast. Another option is GB reanimate. Again, self mill is an option, but there's also Wild Mongrel/Noose Constrictor/Borderland Explorer. My cube is quite large, so I run all of the above (and Spider Spawning), and I generally see GB graveyard decks of all kinds of speeds.
Also, BG does token/sacrifice quite well.
I also think it takes a lot less for Menace to be significant. A single Nessian Asp will result in 8 counters with Menace, and only 5 with the counter snake. Also, I think 4 is a fine point in the curve for this kind of effect. The turn after Curse of Predation, the turn before Ridgescale Tusker.
Also, should I run Triskelion if I run this guy? I think I should.
I'm currently running -1/-1 counters matters, alongside BUG spider spwaning, in golgari in my cube. Mixture of the lorwyn, persist, wither, proliferate and amonkhet cards along with general -1/-1 good stuff like skinrender. I like it a lot.
I also include a +1/+1 counter unleash/bloodthirst aggro for BR so Jund ends up supporting a slower midrange proliferate deck with volt charge, contagion clasp, grim affliction and spread the sickness.
Really happy about a few of these. A few are completely unplayable, but I'm happy with the few I want. Mahamoti Djinn, Indulgent Tormenter i'm most excited about. I love that Curse has a foil version, but, I like to run copies of cards in their correct rarity. :/
**** i was so hyped for charmbreaker devils. that card is a ton of fun and actually pretty powerful to boot. oh well, i guess indulgent tormentor is a decent big boy for black. corpsejack menace is something to keep in mind going forward 100% as well, especially with the redundancy of the friendly snek.
Atm it is really only the tormentor for me. lots of great downgrades for archtypes I am not running. I used to run Sengir vampire just to have a large black flyer and I guess this guy is better. (3 toughness though)