Ethereal

NPC
 * Ethereal Expert
 * Ethereal Fluke
 * Ethereal Guide
 * Ethereal Lady
 * Ethereal Man
 * Ethereal Mimic
 * Ethereal Numerator
 * Ethereal Perceptive

Ethereal outfits are Runecrafting sets that are obtained from Treasure Hunter with certain bonuses for complete sets.
 * Law ethereal outfit
 * Blood ethereal outfit
 * Death ethereal outfit
 * Infinity ethereal outfit