Corrupt Shadow Priest

With Varian, King of Stormwind, Corrupt priest gains a powerful draw engine that draws a bunch of different corrupt cards like Strongman, Darkmoon Dirigible and Fleethoof Pearltusk. It also turns out that both Corrupt spells are Shadow, giving us the option of running Darkbishop Benedictus for a powerful tempo hero power.

Unsure about Carnival Clown, Call of the Grave might be better.