Eldritch Demonologist will possible leave Neutral - Sad. I always thought about trying using it with Pan Marauder. Much better than having a spell "add your domain's creature from your deck into your hand", don't remember the name.
Deception will get another sleep card - I am waiting for it. I am creating a sleep deck from time to time. Just science no real fights still :D Added Scylla to it after this post of yours. Probably, I will try it practically after WR.
Guild-only deck - I mostly play Guild-oriented deck so ... waiting...
Deception will get a spell "get 3 Nether with cost 5 or less from your deck to your hand" this will work well with deuteria for example. Pan Marauder is too expensive for that spell...
My dream is to play a full Sleep deck with 2 Demogorgen. THis must be very annoying for the opponents :D
I can't wait to see your example of a Guild Deck ;)