Actually pretty good. Now you have a demon on every mana-slot, meaning mid-range demon might be a thing again. Even on curve it's not all that bad, since you get it back with Bloodreaver. If the effect goes off, it's obviously very, very powerful.
Not bad at all. I feel like the condition can be a bit niche at times but it does well against aggro and Warlock has a lot of control over how much HP it can have on any given turn. This will definitely see some play