Hearthpwn

Preface

This is a deck aimed at newer players, crafted with the intention of giving you the most power for your dust. This is a combo deck that uses the classic Divine Spirit Inner Fire Stormwind Knight combo. This deck uses 13 basic cards, and 17 commons. 

Mulligan

Against aggressive decks, such as Hunter and Pirate Warrior, you want to look for Northshire Cleric and Potion of Madness. Simply the threat of these cards can make your opponent apprehensive. Radiant Elemental is a good keep against almost any deck, and Shadow Word: Pain or Shadow Word: Death are both good for stalling out turns. 

Gameplan

Your main goal is to control the board, and stick a high health minion on the board. Having it out there means you don't necessarily need Stormwind Knight for the combo, and having the opportunity to end the game is always nice. Priest of the Feast will help you to recover health against burn and aggro decks, and Northshire Cleric and Acolyte of Pain are here to help you draw your combo pieces faster. 

Improvement

If you're looking for more board clears, you could either go with the Pint-Size Potion into Shadow Word: Horror combo, or you could just go for Dragonfire Potion. A copy of Greater Healing Potion could help you stay alive for longer. Last but not least, Lyra the Sunshard gives you a second win condition, if you can spare it. The two Temple Enforcer are probably the first cards to go.