I don't like Mythoses nor the Mutate cards. Yorion decks want permanents, not spells, and you don't have enough Mutate support (i.e. cheap creatures to Mutate on to). Sarulf is also heinous in Yorion decks because he exiles all of your perms too. Personally I would cut these cards in favor of more Yorion stuff and please play the 3 Yorions main + 1 "SB."
For 2 drops I like Mycosynth Wellspring because it helps you hit your lands drops and works well with Doom Foretold. Watcher for Tomorrow is also insane because it triggers on ETB and LTB. For 3 drops I like Oath of Liliana for obvious reasons. For 4 drops I'm a huge fan of Showdown of the Skalds because it's like a Blessing that draws 4 cards instead of 3 and that doesn't cost any life. I know it's 4 mana and it only lasts a turn but Skalds has been amazing in my testing. For 5 drops I prefer The Eldest Reborn over ECD but both are very good. I almost always play the full 4 TERs in my lists.
For additional mass bounce I adore Brago, King Eternal in these builds. Not only does he bounce all of your stuff but he also hits Yorion who then comes back and does Yorion things. It scales wildly out of control after a turn of two.
If you want something silly Witty Demon is bonkers in these decks. Only if your meta is cool with it obv.
Thanks Prid3, these suggestions are really good. I haven't been playing any blue just because my personal favourite colour combination is Abzan, but I'll try a list that uses blue instead of one of the other colours
I'll come back and stick the list here once I've done, and we'll see how it looks
Private Mod Note
Rollback Post to RevisionRollBack
RG Werewolves are the best tribe from Innistrad RG
Dragons are best creature type
WBRG Best control deck is non-blue Yorion Doom WBRG
Mad esome big changes to the deck, still has spome of the old threats, but it's a lot more focused now on being a yorion deck. Kept doom, but I'm barely running black, and it seems to work really well actually. Believe it or not, Showdown of the Skalds was not overly impressive to me in this deck, but maybe that will change with time. What I definitely agree on was the suggestion for Watcher for Tomorrow, which performed admirably in every match I tested with it. The stand-out cards are definitely Watcher for Tomorrow, Brago, King Eternal and the newly available foretell cards Doomskar and Behold the Multiverse, which all performed exceptionally when used. I am not totally sure about Noxious Gearhulk but only because of the double Black, which is amended pretty easily thanks to Arcum's Astrolabe, which has been fantastic too, come to think of it. Here's the new, Mostly Jeskai List:
I'm looking to build a Yorion deck myself. What I plan to focus on is:
Keep the number of colors down. Your deck needs WWWUUUBBRRR to cast all its spells. I would rather build, for instance, a WR Yorion deck and a UB Yorion deck than a WUBR Yorion deck. The mana is better, and each deck can focus on different synergies.