Sierra, with her true legendary rank, could easily get used to the energy of madness. The soul of her doppelganger, partially filled with this energy, had no significant effect on her.
But the situation with the element of death was different.
Sierra is a legendary Dark Valkyrie, born with an affinity for the element of darkness. She had no other elements except darkness, which was an integral part of her being. The darkness was everything to her.
To form the so—called Trinity, she needed to take on the element of Death, one of the most dangerous and mysterious elements.
Since signing the contract with the Princess of the Current, Sierra has tried to avoid the elements of Death. This element, being the exact opposite of the element of Life, was destructive to all living beings.
Worse, due to her out-of-control lack, Sierra almost died herself, and her vitality suffered greatly. If it hadn't been for Arabel and Idan's help, her life would have been at an end.
