Hearthpwn

You're cards seem really cool! Especially the Dungeon cards!

A short review on your neutral legendaries (I'll review more later)

Shade of Eranikus- A really great idea, I love the idea of the Nightmare cards but they seem a tad bit too strong. A 7 mana 7/7 is not that bad and adding a battlecry that might even be stronger than that of Dr. Boom is a bit overpowered. I would make him a 6/6 and reduce the cost of the spells to 2. He would still be incredibly powerful but not overpowered.

Timmy the Cruel- Interesting idea but not strong enough. Maybe if he was a 3/4 with Taunt or a 4/3 with Charge?

Rem the Dungeoneer- Another cool idea but increasing the hand size to 20 seems a bit extreme and it really is not necessary.

Inquisiter Fairbanks- Seems more like an effect a common/rare/epic minion would have since it's not that special or unique. It may as well just have the deathrattle since it does not make a huge difference.

The Headless Horseman- I really like it. Not much to change here.

I fell in love with rogue cards.

Nice Dead Mines and play lot of cards per turn.