Hearthpwn

This is a control deck using big taunt demons with deathrattle and lifesteal. Though this deck have only 5 minions but you will have a relentless pool of demons and primes with Raise Dead and Felosophy

Strategy is to tutor for demons and discount them using Free Admission and The Dark Portal. Demonic Studies can be used to further discount the next demon to deploy your big taunt demon a turn earlier. Ideally Enhanced Dreadlord can be deployed on turn 5. 

Tickatus is an added win condition to remove some opponents cards and disrupt combos. Otherwise focus on Enhanced Dreadlord for improved survivability, board pressure and occasional board clearing. 

Mulligan

[Primary] Free Admission, The Dark Portal, Karenthad Ebonlocke

[Secondary] Felosophy,  Demonic Studies

If you have Free Admission, do not tap on 2 to avoid overcrowded handsize. If you have The Dark Portal make sure you have 8 cards before play, so you need to tap and manage your handsize. 

Note: Handsize management is very important to make this deck work

Kanrethad Ebonlocke is good 2 drop and if you get it in opening hand will guarantee your Free Admission 100% discount. Felosophy and Demonic Studies can be secondary choice for mulligan.