i've always refused to look at spoilers for sets until i've at least seen them first hand at the pre-release, so i can't say specific cards for the upcoming hellvault, but...
i'll be looking for removal, cheap flyers, wipes, and win-cons, as usual.
i can't freaking wait.
Removal is super shallow, Its there but the dumb bombs are insane. Decree of angels was a beating, X=2, (Miracled obv). 5/5 for 5 kitchen sink angel actually turns off a relevent number of cards. Play enough lands. Games drag out but if you miss land drops into your fatties you can get crushed. Flash wolf is really good at mugging dudes but really doesn't stack up to anything with flying well.