The hardest problem on the Illmob Boulder! These slopers are all about friction. Sit start at the base of the arete and try as hard as you can to even get off the ground. Once you're up, toss for the better holds up and left, then follow the slopeyness to the left until topping out. Enjoy.
Also fun as a stand start.
Location
When walking into Natural from Reservation Rd, this is the first boulder you'll see on the left. Faded spraypaint is still visible on the face nearest the trail. On the downhill side of the boulder, this slopey arete is obvious as it moves up and left. Downclimb the slab off the back.