Glob of Ectoplasm

General
Globs of Ectoplasm, often referred to as Ecto, are rare crafting materials.

Crafting
Globs of Ectoplasm are used to craft armor:
 * Obsidian armor (crafted by the Eternal Forgemaster in the Fissure of Woe)
 * Warrior Obsidian armor
 * Ranger Obsidian armor
 * Monk Obsidian armor
 * Necromancer Obsidian armor
 * Mesmer Obsidian armor
 * Elementalist Obsidian armor
 * Assassin Obsidian armor
 * Ritualist Obsidian armor
 * Paragon Obsidian armor
 * Dervish Obsidian armor
 * Chaos Gloves (crafted by Gobrech Stonefoot in the Central Transfer Chamber)

Other uses
The rarity and high demand of Ecto makes them useful as currency, especially for trades valued at more than 100 platinum (the maximum amount of gold that transferred in a single transaction).

What drops it
Globs of Ectoplasm are dropped by the following monsters:
 * In the Underworld:
 * Banished Dream Rider
 * (Including Ghozer Dhuum, Kazhad Dhuum, Madruk Dhuum and Thul Za Dhuum of The Four Horsemen quest.)
 * Bladed Aatxe
 * Charged Blackness
 * Dead Collector
 * Dead Thresher
 * Keeper of Souls
 * Mindblade Spectre
 * Skeleton of Dhuum
 * Smite Crawler
 * Terrorweb Dryder (including Terrorweb Queen)
 * Wailing Lord
 * In the Ruins of the Tomb of the Primeval Kings:
 * Banished Dream Rider
 * Terrorweb Dryder
 * In the Fissure of Woe:
 * Banshee

What salvages into it
So far, only Obsidian armor and Chaos Gloves may turn into Globs of Ectoplasm when you salvage them.