Cabal Ritual

But in a Golgari deck where you don't usually have access to card draw, uh, your deck specifically produces a lot of tokens.

You could sac a food token from Cabal Ritual.

Right.

Right? You can sac-

Sacrifice your Eternal Witness to create a treasure token.

Sacrifice the treasure token to cast Corpse Dance with buyback, returning Eternal Witness to, to play and grabbing Entomb again.

Then sacrifice one of your other creatures, one of your other four, to make a treasure token and cast the Entomb, finding Dark Ritual or Cabal Ritual You will now sacrifice Eternal Witness, and the reason I did it in this order is if you sacrifice the Eternal Witness first, the other creature will end up on top of it in the graveyard.

So you need to sacrifice another creature before you sacrifice the Eternal Witness.