Screaming Deathwatcher

I was taking a break from Eternal this month but decided to boot it up and a card called Chairman's Contract caught my eye. I decided to brew with it and this is what I've come up with, it feels pretty good and you get to use some cards that don't have a home at the moment.
The best way to break it down is probably card by card so here we go:

--------CREATURES--------
Spitefeeder: get the good times rolling
Dusk Raider: nightfall is good and this enables some of our nuttiest kills
Sporefolk: keep the good times going
Gorgon Fanatic: card draw and a bit o' life
Kerendon Merchant: this card does a lot for us gets combo pieces, ways to stall the game, and a way to break stalls
Nocturnal Observer: so good gives card selection and way to pitch from hand
Umbren Deathwatcher: do you remember screaming Toppletower? Well how about being able to go 2 color with a stronger self mill. This is our WinCon get it in the void and it should be safe (Steward of the Past isn't a card right?)
Rindra, the Duskblade: good value card gets in, gains life, is big, replaces itself
Torgov, Icecap Trader: honestly replaceable I like what he does on paper but rarely do i find myself casting him. He can loot for you and get big in theory. I'm not sure what to replace him with.

--------SPELLS--------
Dark Return: good card basically is draw whatever creature you want eventually and helps pull 2 turn kills
Devour: card draw, protection from silences, "chump"
Haunting Scream: namesake card for a reason there is no card quite like this for just winning
Hailstorm: aggro can get under us this also can cut time off power and even can let you sneak some kills(kill your board your Deathwatcher gets bigger)
Sporebreath: this card is GREAT kills anything eventually and it stays dead

--------POWER--------
Amethyst Monument and Cobalt Monument: turn into creatures once you're at 5 power even if they are already in the void, wish i could fit more in.
Chairman's Contract: the reason I built the deck we really do have a lot of self mill

--------NUT DRAW--------
Use Dusk Raider to give Umbren Deathwatcher berserk, then get the Deathwatcher and 14 other creatures into your void, then scream and win Ghostform as needed.