This deck packs a solid blue black counterspell (Dissipate), draw (Jace's Ingenuity), hand disruption (Thoughtseize), milling enabler (Phenax), target removal (Hero's Downfall, Bile Blight), and milling critters (Silumgar, which is hexproof, and Mindscour Dragon). Its capped off by Ashiok.
Silumgar by itself is at least a hexproof flyer.
With Phenax I start getting milled.
I at least was able to remove one of the milling critters.
But the milling worked... Ashiok helped mill the last few cards.