How To Get Etherium Crystals Fast
Etherium crystals are the primary currency in Zombies mode in Call of Duty: Black Ops Cold War. This is what you'll need to do anything in the Skills menu like upgrading your weapon classes, terrain upgrades, perks, and ammo mods.
Getting raw Etherium Crystals isn't as easy as playing a zombie game and being rewarded with more each time to play, no matter how far you go. Instead, you'll have to really work for them and rough them up.
There are two ways to get Etherium Crystals in Call of Duty: Black Ops Cold War. The first of these is to play Die Maschine Endless and achieve certain milestones known as Scoring Rounds which will reward you with an Etherium Crystal even if you never go out and die. This is not the best strategy though, as it can go on for a very long time and not be so rewarding for the time spent with the turns slowing down as you go along.
Your fastest method, while still very dangerous, is to take advantage of exfoliation. This is where you can call out in round 11 and also every five rounds after that, although you have to fight through a lot of zombies to get to the helicopter. However, this will give you etherium crystals for exfoliation, while taking much less time. This will only really work if you're playing solo or playing with a group of friends with that in mind, as you'll find that random teammates won't sneak out too often after just 10 turns. Having a plan like this, however, should help you get more Raw Etherium Crystals in the fastest way possible in the game.