{Unbreathing Horde} + {Cemetary Reaper}/{Lashwrithe}
"Oh yeah, about those counters, you see, I kinda can't remove them, seeing as how he doesn't have any! Yeah, that's a god damn invincible Zombie Horde!"
It's also relatively easy to pull off, I can't wait to play Mono-Black Zombies!!!
If you use {Mikaeus, the Unhallowed}, it'll come back even tougher!ðŸ'ŠðŸ'ªðŸ˜,,
Oh mug gawd I know! I can't wait for Dark Ascension. Mikaeus is a beast!