Hearthpwn

I decided to design an anti-aggro version of big spell dragon priest because of the weak match-up with aggro paladin. Here's what I came up with.

1. Lots of removal and board clears (minion based except for Dragonfire Potion)
2. Lots of dragons to activate 6 cards that require dragon synergies
3. Big spells with big impact (Free From Amber and Mind Control)
4. Cards to activate or add value to the big spells (I'm looking at you Spiteful Summoner and Medivh, the Guardian)

I excluded Grand Archivist from this list because in some board states you don't want to unleash Dragonfire Potion

Strategy:
1. Turns 1-3 draw cards and play defense
2. Turns 4-6 build a board of dragons and/or remove opponent minions
3. Turns 6-8 play the value minions if available; otherwise seek lethal with your dragons

Alternate Cards:
Tentacle of N'Zoth
Mistress of Mixtures
Arcane Tyrant
Primordial Drake

Satellite's more tempo version of the deck runs these 6 cards instead of Doomsayer, MCT, potion:
Shadow Ascendant or Faerie Dragon x2
Curious Glimmerroot x2
Kabal Talonpriest
http://www.hearthpwn.com/decks/1001145-satellites-tempo-big-spell-priest-top-3-legend

And here's the Firebat-inspired prince/pirate version:
http://www.hearthpwn.com/decks/1004039-big-spell-prince-tempo-dragon-priest