Crystallizer

I think this might be one of my favorite cards of the set. While it appears really pointless when you first look at it, the more you think the better it becomes. There are lots of builds that could utilize trading health for Armor.

First of all, it has solid stats. Of course, 1 mana 1/3 is better in a fast deck, but you wouldn't be very sad dropping it on Turn 1 in a slower deck too. And it has quite a lot of synergies:

In decks that run healing, you can't really heal yourself over 30, but with this you "technically" can. For example, one of the issues with a Paladin deck running healing is when you are at full health and some of your cards are useless. You can't even activate Lesser Pearl Spellstone (had to google the name right now, I haven't seen it in Constructed even once).

In Warlock, there are some ways to use it. First, in Heal Zoo, you need to be damaged to heal yourself and play free Happy Ghoul. You already have some better ways to do it on Turn 1, but still. Then, in slower Warlock, this can get you in the Hooked Reaver range or activate the Spellstone while not actually dealing any damage to you (win-win!). Also, it synergizes with the new Nethersoul Buster. A single copy of this guy turns it into a 6/5 minion for 3 mana. Indeed busted!

In Warrior, you nearly always prefer Armor over Health. Not only Armor does synergize with your cards (e.g. Shield Slam), but dealing damage to yourself early might activate Battle Rage. When Warrior is running that card, people often skip attacking his face early to not activate it!

The main downside of this card is that you can't play it when you're at 5 health or lower, since you will just kill yourself. But then again, if you're that close to dying, I don't think that a 1 mana 1/3 would save you anyway most of the time, so losing BECAUSE of this card would be a niche situation.

All in all, interesting card with lots of applications. The ones I listed are just examples, I bet there are more ways to utilize it. So while I don't think that it will be broken in any deck, it can be slotted into some of them for an cool upside over other 1-drops.

Card rating: 8/10