Cho Priest

Use spells to trigger Sand Drudge effect, play Witch's Cauldron so you can trade in Zombie for Shaman spells.

Use Potion of Madness while having Witch's Cauldron on to field to not only make a trade but gaining a Shaman spell as well.

SN1P-SN4P can help with Witch's Cauldron too.

Look a way to empty your opponent's board, play Lorewalker Cho so you can fill his hand with spells that he can't use right away unless playing a minion first thus spending mana ( Extra Arms, Power Word: Shield etc ). This way we can not only mill them, but if they cast our spells back, then we can make our board even stronger. Play Radiant Elemental to reduce the random Shaman spells and our own spells so we can send him more spells back than he can send to us. 

While having Djinni of Zephyrs on board, casting Extra Arms on a different minion will result in 2x More Arms! to your hand instead of only 1. Casting Power Word: Shield on a different minion will draw you 2 cards instead of 1.

Copy Lorewalker Cho, Radiant Elemental with Vivid Nightmare or Elixir of Shadows, while trying to have Djinni of Zephyrs on board.