I would call this deck "Sphincter" not landfall, due to the sphinxes.
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I like the inclusion of crack the earth, but you need a clincher
it is 66 cards, u should try to make it smaler
If you're using Joraga Warcaller, you should definitely put in an Immaculate Magistrate or two!
Unless you want the whole deck to be based around the opponent taking damage from discarding, I'd probably just remove the megrim and replace it with liliana's caress.
Very cool deck idea, but just one thing. Consider using Liliana's caress instead of megrim, or maybe along side megrim. It's 1 mana cheaper, and it makes them lose life, which can't be prevented.
Why city of brass and not Glimmervoid?