Eh but that combo seems slow, very very slow. That and there is nothing in the deck atm that allows me to force the combo when I want rather on my opponents terms for those cards. I will say that Cast down and Victim probably needs to have one or the other to the deck.
I also think (and this is my own perception) that the shade ability gets knocked on too much since most the bodies its attached to are usually so frail that removal when they are on the downside makes them extremely fragile. Whereas this shade actually only needs 1 mana open to pass the bolt test and in its unboosted form passes the 1st stage push test. But as I said that's a perception on my part.
Red should be burn, Goblins, Dragons, draw/discard, and Standard-unplayable 5CMC cards with insane, lengthy effects that take 10 minutes to figure out what they do and another 20 to actually make their effects work on the field.
I wonder if I should drop Grey Merchant and try a different direction using some assortment of Torment of Hailfire, Solemn Simulacrum, Burnished Hart, Gauntlet of Power, Caged Sun and some of the above cards suggested. Don't get me wrong I love my Grey merchies but adding Crypt, or Korlash would make my 4cc spot kind of kludgy. Right now I'm leaning towards Hart and maybe korlash since both hit the field running a bit more overall..