I find it interesting that noone remarked that having
Tree of Perdition on field makes
Emrakul, the Promised End an almost guaranteed 1 hit kill upon cast, barring the opponent topdecking a removal spell in their post-mind slaver turn, or having a wide enough boardstate to kill you on said turn.
G/B Delirium control with From Beyond to tutor for Emma? The main reason G/B delirium is sorta meh currently is its weakness to planeswalkers, outside of that, it's not half bad and has access to some good cards. Emrakul would be the perfect fast clock for this decktype. You could lean on Trees, Seed Guardians and the 2/1 deathtouch manadork to work your way to big momma. Gum up the board with Blisterpods, Gnarlwood Dryads and Carrier thralls early on to buy time too.
Instant (murder and friends) Sorcery (Ramp/Gather the Pack) Enchantment (Vessel of nascency/Sinister Concoction/Dead Weight/From Beyond) Artifact/Creature(Scarecrow/Bottle Gnomes) Land(Evolving Wilds/Fork in the Road etc) .... 7 cost Emrakul. That's not bad and not too hard to get.
I'm definately trying that if we do get Emrakul.
Not sure how I feel about the crazy baneslayer powercreep and reprinting
Natural Order. Guess my fav spoiled card so far that I think we may get is
Elder Deep Fiend. Powerful; splashy, but needs work to be playable. Probably would work pretty well in a Simic mid range deck (Seed Guardian seems like a great emerge target again here). Also like Thalia. Good card, bit pricey at 3 mana, might not see standard play, but good enough for duels. Orzhov Lifegain gets a 4/4 trample first strike Lifelink for 2 mana, that' s pretty sweet too. Wharf Infiltrator is pretty niche, but that's a really well designed card for Reanimator. Kessig Prowler might get there too for R/G W/G aggro.