No Substance is the obvious left arete of the boulder with the same name. Start on the big hole on the left (yes, you can fit through it. Try going in feet first from the bottom!), and work your way up the arete to top out at the apex. It's harder than it looks.
The left arete. Can't miss it.
Crashpad, and a spotter to keep you out of the tree if you fall from the top.
BETA PHOTO: Ian trying to get something out of No Substance.