This is Mount Doom, to be found near the summit of Cefn Du. It consists of a base of igneous stuff with a wizards hat of slate dropped on top. One route is currently recorded following along the low gouge before questing up the slate above. The low smooth blunt arete is up for grabs and has a bolt belay above in the gouged terrace. Looks about F7c-8?. May require a scrub.