OK. At least we can dream about at 10 mana play this and hero power into Deathwing, Dragonlord 😉 And we can kind of play Arch-villain Rafaam first then play this at turn 10 for better odds.
But still unplayable with current tools. 2/5 right now. 3/5 if new expansion introduces two or more really powerful deathrattle minions that fit in warlock decks. 3.5/5 if such new synergies enable an OTK.

Being a fan of tempo mage for a long time, recently I find this deck is really bad against Ziliax. For example, odd paladin was already an unfavorable match up for this deck, and the win condition against them was often ignoring the board at mid game, focusing on face damage. Now that they have Ziliax, attaching it to a 5/5 while attacking the same turn is devastating to tempo mage’s game plan.
And Ziliax is everywhere in the ladder now ;( And no secrets, not even potion of polymorph or mirror entity can do anything when they Ziliax ;(

This brawl just come live on China and I tried to fill my deck with 1 health battlecry/charge minions as mage. It went pretty well.