Works well against control decks. In your hellbent/aggro deck if you start to lose card advantage you simply play into that. These guys keep eating peoples hands but you were already sitting pretty on 0 cards. Considering he's a zombie, he can be used to drop Gravecrawler in the yard, and then you've met the condition to bring him back out; plus he can do this when they're both in the yard, making it even easier!

Augur of Skulls
Undying Evil
Blood Scrivener
Fleshbag Marauder

seems like a reasonable start. You have lots of anti-kill spells, card draw, non-targeted removal, global discard, and mass discard. Maybe toss in a finisher, especially any that can nail people from the grave, and a few kill spells; and you should be good.