Full spoiler is out now. Does anybody see anything they want to use in the main or side? I got nothin'.
Malicious Affliction is an interesting way to get some advantage on the board, but double black is hard to manage. It mandates playing Badlands, which has a nonzero opportunity cost. I won't deny that this type of removal effect is desirable, however in my metagame, the nonblack qualifier is a disqualifier as there are a lot of black creatures in need of destruction (including, technically, Painter's Servants).
justjammin's list without Probes intrigued me, and now I've cut the three I had left in my list in an experiment. In their place, I'm now playing a second Spell Pierce, and the two remaining slots are flexible. Right now, they are Murderous Cuts, since without Anglers I have lots of Delve fuel, and as I mentioned that effect is desirable in my local meta and, I think, the metagame writ large. Other cards I considered:
Forked Bolt
Chain Lightning
Sudden Shock
Fire // Ice
Disrupt
Divert
Flusterstorm
Repeal
Echoing Truth
Thoughtseize
Hymn to Tourach
Sword of Fire and Ice
Umezawa's Jitte
EDIT: Just thought of a couple more:
Snapcaster Mage
Jaya Ballard, Task Mage
Grim Lavamancer
Predict
Thunderous Wrath
I'm sure there are other options, too. Utility slots are hard to fill.
I'm not on board with Winter Orb yet. I think if you do jump on the bandwagon, be ready to play it incorrectly a lot, because timing it seems critical. You need to be casting it after it's unlikely they will be able to play more lands untapped to get around it, so you can't just jam it early and ride it like a Blood Moon or Tsabo's Web. But if you wait too long, the effect won't impact the board at all. The effect is definitely strong against Lands and maybe Stoneblade/Nic Fit, but just be careful.

