Hearthpwn

Face.

Spells.

Midrange.

Big/Recruit.

More Face.

These are the 5 types of decks usually associated with Hunter. This deck is the Jack of All Trades. Unfortunately, it may not master them by losing out on a few things. One-drops, Lesser Emerald Spellstone, Animal Companion, Witchwood Grizzly, and King Krush. However, being able to press the "face" button every turn, and the cohesion these cards add to each other make up for it by creating an endless stream of Hero Powers and Tempo Plays.

Mulligan:

Doomsayer and Wandering Monster are so good played on turn 2, (or turn 3 sandwiched by a hero power before and after if the opponent plays nothing,) that they should always be kept in the opening hand. Grievous Bite is very good removal for early/midrange minions, especially when combo'd with Tainted Zealot or Bloodmage Thalnos. If you're afraid of turn 1 Mana Wyrm, then go ahead and keep them. Against Warlock, hard mulligan for Acidic Swamp Ooze.

Over the next few turns, keep playing secrets to counter your opponent and pressing the button until you can play a 6-drop. Doesn't matter which one. 4-drops are also really good for controlling and staying alive. Houndmaster Shaw is scary no matter the situation.

Once you've played your 6-8 drops, the opponent should either be out of removal, out of board, or out of health and you can safely press your button every single turn until they die, watching their health slowly deplete little by little as every turn they hope for salvation in the next card, only for you to keep drawing and keep. pressing. that. button... Also, Deathstalker Rexxar is pretty good at that point.

Replacements:

[card]Bloodmage Thalnos[/card] can be replaced by a second Tainted Zealot, Wing Blast, or Spellbreaker. All 3 of these are interchangeable for a second copy of another.

You'd be hard pressed to find better replacements for your 4-mana cards, and The Lich King is just all-around very good. If you really want to go for the lategame, you could add Dire Frenzy. If you really want to go for survivability, you could add Dire Frenzy, Vicious Scalehide, and Witchwood Piper instead of Seeping Oozeling and Kathrena Winterwisp. I'd argue it's riskier and puts a lot of faith into you drawing Deathstalker Rexxar, but it could work.

Enjoy!

 Edit: +Tainted Zealot, -Bloodmage Thalnos. Just realized that Thalnos can sometime mess up Seeping Oozeling, but the above replacements remains true