Essence of Desire is one of the major currencies in Destiny 2: Heresy, the third and final episode that wraps up the Light and Darkness saga. Along with other minor currencies, like Metastasized Essentia, youll use the Essence of Desire to get yourself some powerful new loot so you can take on The Taken King once again.In this Destiny 2 guide, well walk you through what Essence of Desire does, how you can find more, and where you can get Metastasized Essentia.What to use Essence of Desire for in Destiny 2Essence of Desire has two major functions in Heresy: fuel and keys.First up, Essence of Desire is the fuel for your Tome of Want in Destiny 2: Heresy. The Tome of Want will allow you to focus your loot drops. It can be focused to a category, like new Heresy weapons, or it can be focused more specifically, like on the episodic Watchful Eye machine gun. When you put the scriptures into the Tome of Want in order to select your desired loot piece, youll finish by putting Essence of Desire in at the end to activate it. If you dont have enough Essence of Desire and the cost differs based on the spell youre evoking you wont be able to activate your Tome of Want at all. Second, you can spend Essence of Desire on bonus chests found inside the Dreadnaught. These chests are thinner than the normal chests inside the ship, and are modeled after the Kings Fall raid chests, if youre familiar. When you encounter them, theyll ask you to offer two Essence of Desire in order to open them. Doing so will net you a guaranteed Heresy weapon, some Sigil Shards, and a more general currency, like Enhancement Cores. How to get Essence of Desire in Destiny 2Essence of Desire is a general drop in Heresy, and you can get it from a few different places, including finishing playlist activities with your Tome of Want active, and completing activities inside the Dreadnaught. However, those passive methods pale in comparison to something the game never teaches you about: the altar in Eris apartment.Just to the left, along the wall inside Eris apartment, youll see a strange rock pillar with a Taken orb floating in the middle of it. When you walk up to it, itll ask you to offer Metastasized Essentia if you have some or tell you that you dont have enough Metastasized Essentia, and that you require 10. If you offer up Metastasized Essentia to the pillar, itll consume the currency and youll get two reprised weapons from Season of Arrivals, some materials, and a whopping 10 Essence of Desire.The pillar sacrifice is by far the best and fastest method for getting Essence of Desire, but youll need to collect a lot of Metastasized Essentia to make it work more on that below.Where to find Metastasized Essentia in Destiny 2Metastasized Essentia is the location currency for the Dreadnaught, Oryxs massive flagship which has returned to the game as part of Heresy. Its where youll spend most of your time this episode, and complete runs of The Nether, the roguelite mode that takes place in the familiar location (and puts a focus on healing).Like any other planetary resource, youll want to go to your Ghost and put on the Wombo Detector mod, which will allow you to see any resources and chests within 50 meters of your character. Just jump into the Dreadnaught with the mod on, follow the grey diamonds, and youll get plenty of chests and resources. However, youll notice that when you first pick up these resources theyll be called Fleeting Metastasized Essentia, and are a slightly different color. If you leave the activity with any Fleeting Metastasized Essentia in your inventory, itll disappear and you wont be able to use it at the pillar. To remove the Fleeting from your Metastasized Essentia, you just need to complete the run of The Nether that youre doing. This is a mechanic to keep you from jumping into the Dreadnaught to grab two or three easily accessible Metastasized Essentia, backing out, heading back in, and doing that for hours on repeat. If you want your materials, youll have to finish out the run to get them.