Hearthpwn

Would be nice and played on 6 mana...

You can just play Deck of Chaos and Top Deck it you should be good

I'm struggling to see how this gets played.  It's not a bad card but do think it works well.  Curse warlock would rather play curses.  8 mana is pricy and so it's clearly not going in aggro.  In a control deck the 6 damage isn't that relevant.

It's good stand alone but just doesn't fit well into any decks.

I don't think this gets played, I think it gets discarded by the new warlock slime.

what a cool but annoying legendary! cool because I wanna play it, annoying because I really don’t wanna play against it 

So a slightly smaller alexstraza that both damages their hero and heals yours for 1 less mana and needs immediate removal?  Seems solid. Not OP, but should see play. 

Eh, unless you can cheat it out somehow it's not great, but I guess the point is to do exactly that with Tome Tampering in Discard Warlock.

Leeroy with a body, health, and lifesteal?

Dar'Khan is the name of my Nespresso capsules

Would its effect go off before it dies when resurrected with Habeas Corpses?

Edit: Tested with Despicable Dreadlord and its effect did go off before death.

It's like mini lifesteal ragnaros that always hits what you want it to.