Uredo

He wanted to be loved for being just what he was. In this community of Yskalnari there was harmony, but no love. He no longer wanted to be the greatest, strongest or cleverest. He had left all that far behind. He longed to be loved just as he was, good or bad, handsome or ugly, clever or stupid, with all his faults - or possibly because of them. But what was he actually? He no longer knew. So much have been given to him in Fantastica, and now, among all these gifts and powers, he could no longer find himself.
— Media revolving around Blight.
Users of the Uredo essence seek to make those they target under their complete and total control. Mostly focused around mind manipulation first and mutation second, Uredo uses a mixture of all its various pathways to pervert ones natural body. The user can make others forget who they are, they can't remember about their places, habits, names, jobs, what they like and/or hate. They can overwrite the memories, personalities, intentions, preferences, and habits of oneself or others with another character they choose.   Uredo Users in extension can manipulate life and living organisms, including but not limited to genetic alterations and physical distortion and/or augmentations of biological functions. They can cause cells to augment to induce advanced or declined biological healing, induce and cure diseases like cancer, induce appearance alteration, manipulate pheromones, and even increase physiological maturity.
Evolving from the Mana Blight, the Uredo essence has been a work in progress for a very long time. At one time present as a breeding ground within The Viel, created by Dr.Valdis senior, (Thanatos Nox Valdis' father). Using a corrupted form of Floro it was manufactured through the support of the universal darkness and other various essences such as Nostro and Mana wishing to create that which would spread naturally on its own, but be a form of mental rot, and physical torment. An 'animalification', turning people into nothing but mindless beasts to be tormented and sacricied for higher powers at will.   That which makes Users of the Uredo essence so unpredictable is the fact that not even they can truly control the primality that has taken over the Uredo Essence. The Uredo essence will choose to mutate and manipulate those at its own wills and beckons similar to Pure, but in a much more painful way. To wield Uredo essence you will eventually forget yourself, just similar to how you force onto other people. It is whether you are reborn into something new, or something horrid which is up to the beckoned whims of the throne of Uredo.