There and Black agian...casual (sugestions)

I would suggest Balthor the Defiled if you're looking for something to replace the Demigod.  You should also consider Entomb instead of (or in tandem with) Buried Alive.  Buried puts more into the graveyard, but Entomb does it infinitely quicker.  Also, Carrion Feeder works really well with Living Death...just sacrifice all your creatures to the Feeder, then cast Living Death for a one-sided Wrath of God.  Also, one card that I just discovered for a similar deck that I'm running is It That Betrays.  As far as I could tell, it was the only big Eldrazi card that would actually stay in the graveyard, which made it perfect for the game, and stealing your opponent's permanents is always worthwhile.

I remember that too, so I looked it up.  It was restricted in Vintage and banned in Legacy in 2003, and also in Extended a few months later (by that point it was out of Standard anyway).  The Vintage restriction was lifted in 2009, and the Legacy banning was lifted a few months after.