What are your thoughts on Dark Confidant (possibly lose 4 life if you revel Skyshroud or Reverent Silence), Thoughtseize (Fetch shock into TS for five), Sylvan Library (Lose 8 life draw three)? I would think that these help towards either building enough cards for the Kavu/Cure combo or working towards getting Death's Shadow out as a fatty. This kind of seems like a plan B worth exploring for the deck, as one thing I've noticed while playing the deck is that it is lacking a secondary offense behind Kavu.