Orb of the Crawler is used to disguise players as a crab while on the Zoram Strand in Ashenvale. Use it to eavesdrop on the Twilight's Hammer cultists in the area. Follow the braziers west of the entrance to Blackfathom Deeps and turn north once reaching the water. Use the item close to the bonfire and pillars. Only the scripted Humanoids in the area will be made friendly. All other mobs are still hostile.