Ivory knight is balanced around heal and the fact that it's spell only... you're not asking for ivory knight, you're asking for a different card that is much much stronger.
Well, Ivory Knight is pretty damn OP as is, but sure, I'll take a spell instead of a minion. Warrior gets Armor, though, that is its class identity. Paladin gets heal, that is its identity.
Warrior has some pretty bad spells, but I guess even an extra Revenge might be good. A third execute would be awesome even if the armor gain was minimal. Getting a brawl vs a midrange deck? Exquisite. I'm salivating. Paladin gets life gain and card advantage, while Warrior gets Life Gain and a random 4-drop (and most 4-drops are bad. I got a 2/2 in my last game, that was fun.)
Doesn't matter, since it'll never happen. I'm still sad looking at all these rad class cards the other classes got.
Oh well, I guess once Bash and Justicar rotate Ironforge will probably make the cut.
I'm still trying to make the Portal work. Using it in my Nzoth Control Warrior instead of Harrison (not seeing a lot of Doomhammer at this point in the season) and it's okay. The minions are almost always terrible. The best one I've gotten yet is the Tournament Medic, mostly because the midrange Hunter deck I was facing decided to put 8 damage into it to prevent me healing for 4 every turn. (Hadn't drawn Justicar yet.)
Funny story, I updated my N'zoth deck today to try and lower the curve a bit to help with all the tempo decks, and I somehow ended up taking out one of my executes. Had this long, epic game vs a Reno / C'thun / N'zoth Rogue and I waited all game for my second execute to take out his last threat (C'thun) and win the game. I never drew it and had to concede realizing I fucked up in the deckbuilding screen. That was frustrating, since I outlasted him playing 3 Renos and N'zoth and all I had to do was remove C'thun and win. FML.