Sit start with hands on opposite sides of the large block, right on a good edge and left in the crack. Pull up and establish on the two triangular peaks at the top of the block. Crux is getting the right hand pinch up on the arete and hiking the right foot high in order to get a really good (no hands needed) knee bar. From here it isnt too hard to get a good but sharp left hand crimp on the face and finish with a big move up to the juggy top edge of the arete. Easy top out to the left.