Blue's milling tends to come in two mechanical parts: spells that mill numerous cards once, and permanents, most often creatures, that can repeatedly mill smaller amounts of cards
Bismuth Mindrender Speaking of stealing cards, there's a high chance that Bismuth Mindrender can use its opponent's cards against them
And then theres aristocrat decks, which are all about sacrificing your own creatures
Did you catch all the symbols dancing in the art
Barring radical changes to the shape of the Modern format, I dont believe it likely that any copies of Abrupt Decay, Terminate, Dreadbore, or Maelstrom Pulse should be in Jund after Guilds of Ravnica
If the permanent is an illegal target by the time Chaos Warp tries to resolve, it won't resolve and none of its effects will occur