Demon Hunter is getting one of those Rastakhan's Rumble spirit cards now. I wonder if they print one for Death Knight this year. +2 Attack for one turn is okay, but I'm pretty sure it will be quickly delt with once it unstealths.

I forget, do these need to be in your hand to upgrade them? If not, it will be so easy to get this drawing three cards. If yes, holding on to this for four turns just to pay 2 Mana to draw three cards seems a bit crap.

I'm liking this one. You can target something smaller that has minions adjacent to it and not be wasting the damage. Maybe even kill three minions with it.

I have a hard time imagining playing this on anything except Magtheridon, Unreleased. 6 more damage to all enemies. Then when it awakes again you play your second copy. Well, I guess in a pinch it will work as temporary removal if you have no better options.

This will probably be good with something. Both the 5-Cost 6/5 version and the 1-Cost 1/1. 

I guess with three random cards, at least one or two will be helpful most of the time.

A card that does something while Dormant, that's new. Your opponent will take 6 face damage and there is nothing they can do about it. And afterwards, they'll have to expend quite a bit to avoid taking another 8 damage.

I don't know what the best targets for this will be, but being able to possibly kill something big without your minion taking any damage is definitely good. Then you can do it another time with the Mini.

This is going to be really nice. Especially if you can get it out early.

Decks that run this card are probably going to be easily playing this for 2 Mana or so. Perhaps even for free if they played Audio Amplifier previously.

Bring back a big threat your opponent thought they were done with? Sounds good to me. Unless they play around it by killing an imp afterwards.

Maybe. You'd probably want to play this on turn 6  or later to make sure you can afford to play the temporary copy before you lose it, and have a target for it.

One big demon on turn 4 or 5 is better than two on turn 9, isn't it? This is probably doing to be mediocre.

Warlock has a history of self-damage. I'm not so sure there's much going for it right now, so this probably won't be great. Though it would be pretty hard to deal with if you played in on turn 3, but is it worth 5 damage to your face?

I wonder what the best target for this would be. I'm sure there will be something, though waiting 2 turns for them to awaken might suck.

Definitely a very good card for big demon decks. I think. It might be a bit too hard to kill.

+1 Spell Damage almost on demand for three times seems pretty damn good to me. Especially since you only have to invest 1 Mana for it.

I expect there will be lots of good targets for copying with this, and I doubt it will be hard to activate the effect.

Complete garbage for 5 Mana, pretty decent for 2.

Best of the Wind-Up cards, since this one costs 2, while the others cost 6, and after 1 Trade it pays for itself. Probably still not going to be wonderful.