Hey there!
I think this deck would want to focus less on creatures (maybe playing none) and more on spells.
Not sure if there are enough 1-drop cards to get the
Imminent Doom started. Maybe some number of
Unsummon? Also
Abrade is pretty good as a 2-drop.
For this kind of deck you really want to have varied costs up the curve, so a bunch of ones/twos/threes etc. Not sure what the exact mix is, but through testing you'll see if you can reliably put counters on
Imminent Doom. Right now you have 7 one cost, and only 6 two cost. I don't think that will be enough.
Baral's Expertise also has negative synergy with
Imminent Doom, because it casts the spells in reverse order (5 then 4, where doom wants 4 then 5) I would consider removing them, maybe to be replaced with
Hour of Devastation.
Maybe some number of
Supreme Will would be good. And some 1/2 mana interaction. I would say something like 8 one drop spells, 10-12 two drop, then your 7 'engine' enchantments, along with 6-8 three drops, and maybe some 4's and 5's. Once you start dealing 4 and 5 damage with the
Imminent Doom, the game should be over (considering there's also burn spells in the deck)
I like that the aftermath cards are two different costs, so they can trigger the
Imminent Doom twice.
Some other cards that may be good:
Collective Defiance,
Fateful Showdown,
Censor,
Essence Scatter,
Negate,
Shock,
Fevered Visions (though maybe better for the board in case of
Solemnity or something, don't wanna
overload on 3-cost enchantments)
Commit // MemoryIt's possible with so many spells that
Enigma Drake could be really good. Anyway, hope this helped!