There are a lot of specific Avatar: The Last Airbender references included in the Avatar Elements Fortnite crossover, which can make for a pretty confusing event to get into. Even if you're fairly familiar with the show, there are some obscure references like Chakras that you might not remember.
How to Complete Light Chakra Missions To unlock the Light Chakra Fortnite – Avatar Elements mission
Chakras technically have two different meanings and purposes, depending on whether you’re wondering what they do in Fortnite or what they do in the Avatar universe. The two are connected yet distinct, which makes things a little confusing, so here’s what Chakras are in Fortnite Avatar Elements.
Chakras are essentially special tokens that you need to collect six of for the Avatar Elements Battle Pass in Fortnite. You can think of them as a currency that you can only earn by completing special Chakra missions. Aside from having to earn them in the event, Chakras are explained as a series of special points on the body that are connected by Chi in the Avatar universe.
Four of the six Chakras are connected to the four key elements in Avatar: The Last Airbender, including Airbending, Waterbending, Earthbending, and Firebending. The last two Chakras are for sound and sight.