I'm trying to construct a discard deck that uses these three cards to totally dominate the board. Mindslicer should be accelerated out early, then pitched to a Diabolic Intent. While the ability of Intent is on the stack, Howltooth Hollow can be activated. I was thinking of using something like Plague Wind or Decree of Pain to hideaway, then I can activate it and replenish my hand and/or destroy all creatures. Then when the ability of Diabolic Intent resolves I can search for an Avatar of Will and play it.
What cards would you add to this deck to make it quicker? Thoughtsieze? Tutors (besides Diabolic Intent)?
I'm thinking disruption on turns 1 and 2, Mindslicer on turn 2 or 3, and Diabolic Intent / Avatar of Will / Activated Howltooth Hollow on turn 4.