This is simply an idea I wanted to share. The idea is for an avatar who only controls the sub-masteries of the elements.
That is, metal, lightning, lava, and ice, being unable to control the four natural elements but possessing these sub-masteries.
I also had a vague concept of something called "Lightning Kai," a more dangerous version of Agni Kai where lightning masters (firebenders who have mastered the lightning technique) are used.
And well, the sub-avatar was conceived as an underground fighter, treated as simply a killing machine. She doesn't speak, she doesn't question, and even if her chains were removed, she wouldn't run away, mainly because she feels she has nowhere to return to, or that she sees herself as something that should never have existed.
If you're wondering about her origin... well, theoretically, I thought she would originate when the spirit world and the mortal world connected (that is, the first time the spirit world invaded the mortal world in Korra), and the idea would be that instead of simply giving her... This girl, who possessed control over the four elements, experienced something "different."
A clandestine group was attempting to "create their own avatar" without success. However, when the spirit world began infiltrating the mortal world, this spiritual influence affected the experiment, causing the girl to connect with the spirits of masters of the elemental sub-arts.
A metalbender who had died during her initial training with Toph and was always ashamed of herself; an icebender who gave everything, even his life, for those he loved; Ghazan's father, a ruthless yet strategic and Machiavellian lavabender; and finally, a firebender who suffered an "anomaly" because her flames were so intense they burned her alive, forcing her to use lightning techniques since her fire power was so strong it slowly destroyed her.
This sub-avatar is not linked to any entity like Rava a Vatu, but rather to four mortal souls who are masters of these sub-arts.
Like the Avatar, she can communicate with the souls connected to her, and she has an equivalent to the "Avatar State," but instead of being a defensive mode, her Avatar State is a "state of panic" in which her body attacks with full force at the slightest perceived threat or disturbance.
And this indirectly caused her to become an imminent danger and a ticking time bomb.
It's just a concept, but I wanted to share it and read your opinions and questions.
By the way, I'm using the "discussion" tag because there isn't a "general" or "other" tag or anything for fanfiction. I hope you don't mind.