Interesting card, similar to but way easier to make work than Gather Your Party because you don't have to build your entire deck around it. Even Warrior has been a deck that has seen some light play, this could be a good fit.
I find it interesting how you can manipulate your armor to get what you minion you want. Say you’re at 8 armor and you need grommash to get lethal or to kill off your opponents minion, then you don’t hero power. But say you ran deathwing, (bad example because there’s not many good statted 10 drops) you could hero power to pull him out for the stats.
Why not make this summon a random taunt minion with cost equal to your armor? And print taunts to fill the gaps. This way it would be a solid defensive card that fits warrior. In this form it is weak, boring and bland.