Hearthpwn

The point of the deck is to get the combo of aviana at 10 mana with kun being able to reset the mana to 10 and then playing brann plus a c'thun that at that point should be buffed around 10-15 attack/health. The azure drake can also be used at that point with the brann to get 2 draws to maybe get c'thun on luck if you don't have it yet. Also this can win without c'thun in this situation just because of the board is now crowded, but beware of classes that can mass aoe (doomsayer + mage, brawl, equality, etc.)

Harrison is interchangeable I just thought it would be good for against the Pirate / Weapon warriors at the moment plus it gives card draw which is what you want to be cycling.

Only use youthful on two circumstances, you need to get another reno battlecry or on the mass combo of c'thun aviana kun and brann to proc the c'thun battlecry again for a second time.

Nourish always for card draw

Starfall with Poison Seeds almost on every occasion

Raven Idol again almost always spell since having one swipe sucks and or getting something like an innervate or a card that removes and gives a card draw like wrath is a big plus in this deck that is focused on cycling through cards