Gravekeepers win At Atlanta YCS?

I only have a few words to say. Necrovalley, Necrovalley and Necrovalley. What are most decks relying on? The graveyard. What if I put together skill drain and necrovally and tyrant's temper? Necrovalley wins the duel alone. I believe people will now side against Gravekeepers. I am trying to make a Horus build using gravekeepers. I want to shut down the graveyard, monster effects on the field,grave and traps and spells.