So your build is likely going to be different than mine, but for my main win condition I use
Aetherflux Reservoir. I did build Mishra as a storm deck, so that naturally wins games. Besides just casting a bunch of spells off of
Possibility Storm, I can also build into it using
Bolas's Citadel and
Sensei's Divining Top, or Top +
Mystic Forge + cost reducer. The end result is the same; cast a bunch of spells with Aetherflux out, get to 151 life, nuke the board.
As a backup win I use
Thopter Assembly +
Time Sieve, but I've been wanting to replace this one as it uses too many dead cards. I also experimented with
Cranial Plating, but it wasn't that effective.
If you want to know more, I've written a
primer on this deck, although it's not a chaos build like you wanted.