Hearthpwn

this card is a big surprise, there is quite a lot of people that start playing their cards without noticing their HP going down..seriously

If it was a priest card you could combine it with Temporus for the ultimate gamethrow combo

People are underestimating this card.

This card will work wonders in curse warlock if they have the 6 mana board clear ready for the next turn especially.

Will be really bad against a few classes that use pirates and smite. Other then that this is a very very good card. Could end up even being a 5 star card. Just wait.

Draw entire deck. To the front. To the front. Galvangar faceless Battlemaster on turn 5.

"My thanks."

It’s no loatheb 

5 mana Millhouse.  Hilarious.

So like this definitely blows up in your face way more frequently than it helps you right? 

Only way this could be maybe good is if it was double health cost for each mana the card costs normally.  

It seems like it could be decent in faster decks. If your opponent is at ~12 health or less when you play this it puts them in a weird spot. You can't just play it on curve but I do think it has a place.

Enemy quest hunter:

you play this, your opponent is either gonna out heal the cards they play and make a big board or they just go down dangerously on HP and make a big board again1. the 6 mana AoE guy can take care of the board 2. against burn aggro or OTK that can heal (like board priest) you lose 3. enemy low some curses wins the game.

i see a good midrange Curse deck which demands actual thinking emerging 

5-mana: Lose the game. Cool.

Battlecry: Lose the game.