Hearthpwn

Well met!

You made it to Level 10* with your Paladin, unlocking all those cards--now you want some wins on the Ladder. This deck can get you some in a hurry, and using only two Rares! It's just under 1000 dust to craft the cards you don't get for free, and a lot of those will see play in other aggressive decks you'll build.

Well played

This is an AGGRO deck. You are trying to win by pushing damage to the opponent's face, and fast. You pretty much don't care about the opponent's minions unless they are going to kill a lot of your dudes on the cheap; for example, don't push for (non-lethal) face damage if they have a Knife Juggler out. Get rid of that thing. That said, if they use up 2 mana to cast a Disciple of C'Thun and you have three guys? Who cares--go for face, that Disciple is going to take three turns to beat just those guys, and you'll be making more every turn. 

Emptying your hand early is a strong move with this deck, as you use Divine Favor to recover. You want them to get three, four, five cards ideally. It's a huge swing and will carry you to victory.

For justice!

You'll need to spend dust on those Divine Favors to make the deck work. The balance of dust is spent on three things:

• Aggressive minions like Abusive Sergeant (another minion gets +2 Attack this turn), Leper Gnome (Opponent takes 2 damage when the Gnome dies) and Ravenous Raptor (gets a cheap buff from Adapt.)
• "Buffs" that make your minions better like Blessing of Might (a minion gets +3 attack), Argent Protector (a minion gets Divine Shield)

You're going to come out fast with this deck. Turn 1, you probably made a Leper Gnome. Turn 2, you buffed it with Abusive Sergeant and played an Argent Squire. They killed the Gnome, but turn 3 you Blessing of Might the Squire and play Argent Protector on your Sergeant. It's not yet Turn 4 and the opponent is at 18 life. Turn 5 you'll play another guy and use Divine Favor to draw three cards that seal the win on turn 6 or 7. Maybe with a Charge minion and Consecration. It's very quick!

That was a mistake

So what's going to go wrong? Mass removal is rough--things like Knife Juggler + Forbidden Ritual is bad and going to wreck you. Wild Pyromancer is tough too, but mitigated somewhat by all the Divine Shields. The thing to remember is that your minions don't really matter. If they enabled you to get ~2.5 damage in on the opponent--they did their job. Likely, some will do much more, given the volume and their interactions. Try to maximize how much damage you can deal (this is called "Reach") before big removal turns: 5 for Priest's Holy Nova, 6/7 for Mage's Blizzard and Flamestrike, 4 for Paladin's Consecration, Druid's Swipe, and Warlock's Hellfire. These are good value turns for the opponent, but they usually mean they have a lot of cards in hand, and set up your Divine Favor-fueled recovery.

Misplaying the board would be bad. Almost to exclusion you want to use your guys to kill their guys against Taunts or asymmetric threats like Knife Juggler that will kill a lot of your guys. A good mental exercise is, "If I don't deal with this, how many mana's worth of my guys will die to it?" Use your face (Rallying Blade) to kill things on the board. There aren't any bonus points or Achievements for winning a game 30 life to 0. Use your life like a resource to push damage through.

If you are missing Rallying Blade, a totally solid swap is Steward of Darkshire--still a rare, so the dust cost is the same. It's not as much Reach (see above), but it does set up some really unpleasant interactions for your opponent, as many of your creatures "get the buff" (i.e., activate Steward of Darkshire's ability.) I wouldn't swap out the Divine Favor for Steward, you need to draw cards.  

Have fun, and good luck!

*Actually--you just need to be Level 4 to get your Consecrates and get this going, but you probably need to play a little to get enough dust for the crafting.