Concoctions are getting me very curious. I just want to know how the mixing works and what are the limits to them;
As far as we can see so far, their effects are useful and works similarly to DH's artifacts

Ah yes, let's bring back the most well-loved of Hearthstone characters, Professor Putricide. He really gets the kids going!

Honestly, this isn't too exciting. Artifact DH would be terrible without the Location. Most of the Concoctions don't look like cards Rogue needs (especially at 3 mana). And you'd want to be playing this bloke when you're about to make a trade with several minions - A) I don't think about Rogue as having many minions and B) Rogue? Trade? Hmm?

You could also drop it before slamming a minion with a spell, so there may be Potionmaster Putricide + Backstab early game plays, but it seems unlikely later on.

Anyway, shoot me if Concoctions gain any traction whatsoever.

Alchemy Rogue a thing combined with Gadgetzan?

I assume that the text of Mixed Concoction changes based on what other concoctions you get. If you get all three, that's a lot for 3 mana, and in the right deck, it will be extremely easy to kill three minions in one turn. Even if it takes two turns, with 4 health, this might survive that long in the early game. Though if played on curve, best case scenario I see is 1-drops mutually killing each other for two deaths, then spell/rush minion/weapon on turn 3 for third death.

Before i vote i want to see what Concoction is first...curious though

Thanks to Shadowjeweler Hanar we know that 2 mana 1/4 minions are very sticky early on, and this can just be slammed down before you trade in a few minions. I think this will see play.

Edit: After A MINION dies, so this includes enemy minions! Okay this card is nuts. 

Might be overkill honestly. Like, realistically, what do you do with all those concoctions. They're good plays early on or to fill the curve but just 3-mana random 3-drop that deals 3 damage won't win you the game against the more powerful stuff out there.

Might be a Skeleton situation where only the really good cards end up seeing regular play while the more gimmicky stuff falls out of favor.

This would be second time we're seeing putricide and I can already say with some confidence that this card is like its predecessor, utter garbage

So much contrivance just to get concoctions and then at random. Which means you're essentially adding more bricks to your hand as you struggle to do anything useful. Also, the conditions to get those concoctions are too much of a stretch for rogue, the one class that hasn't got a lot of board control cards. In other words, its only ever generating value if youre either ahead on board, or have a board with initiative.

At this point, the only good thing I can say about this card is that its a 1/4 for 2. It'll stay alive at least half the time, but I wouldn't be surprised if one of the best ways to play against this card would be to allow it to get as much value for your opponent as you can manage and brick his hand.

Perhaps at some point team5 would print something akin to Cloaked Huntress for concoctions, which will make this card playable. Until then getting this card as your free legendary is just criminal.

The Druid is gaining 12 armor for 5 mana! This rogue's set of cards sucks! There is no balance in this game! The game does not help those who play rogue! Sadness!! Great, in this new collection I won't play rogue! Oh stupid company!!

Feeling a little meh on this card, but I think the concoctions are a quite strong package overall to put in Rogue decks. Would those decks also be able to swarm the board to get value out of Putricide is what makes me hesitant. Right now, Door of Shadows barely gets infused, and I'm not sure if there's going to be a new Tempo Rogue brewed out of this.

"Good news, everyone! I'm turning dead minions into potions!"