Interesting reward for flashback decks in Limited. High flying makes this weaker than stuff like Talrand's drakes, but you weren't going to be blocking with these things most of the time.
Ravens and other corvid remember faces very well. This could be less an ominous night and more a night of shouting at your roommate for feeding the ravens from the park all the time and now you have bird poop all over the place.
Made specifically for flashback; there aren't enough jump-start or aftermath spells in blue to make it worthwhile. hrm...now that I think about it there aren't even enough embalm or eternalize spells in blue. I suppose a couple of copies of Mission Briefing but no one uses that. Will be interesting in Limited.
I have to say, I really like the "star rain" effect around the moon they came up with for this set.
From the stream they confirmed that the wonky day/night cycle, the spike-y frost and the "star rain" is all effects of Emrakul now in the moon.
You know what? I'm quick to complain about anything MtG these days, but that is pretty cool. This is the kind of stuff that I want to see upon returning to a plane, not "yeaah the previous set happened, but please forget about it, we have this new thing for you now." References to the past don't have to be the focus, but it's so much better when they're clearly there.