This is a fun twist on the old Limited staple card - Gravedigger. But this time it has Changeling, which makes it perfect for any and all tribal decks.
Even the artwork is similar, and yet it's not exactly the same. So a strictly better Gravedigger should be an auto-include for almost any type of black deck.
Also, if you have two of these in your draft, you can go infinite with them by returning each of them from the graveyard.