The battle rages on, but Kei feels herself being pulled deeper into the void. The Echo's voice fills her mind, whispering dark promises and tempting her with visions of power.

Echo (whispering in Kei's mind):
"You are one with the void, Kei. Embrace it. Accept your place in the darkness, and all this will be yours."

Kei falters for a moment, her grip on her magic wavering as the temptation gnaws at her. The visions show her a future where she wields unimaginable power, where the void bends to her will.

Kei (muttering):
"I could stop all of this... I could control it..."

But then she hears another voice—a memory of Teri, reminding her of who she really is.

Teri (echo from memory):
"You're not alone. We're in this together."

Kei shakes her head, snapping out of the void's hold on her. Her magic flares back to life, brighter than ever before. She focuses, pushing back against the darkness.

Kei (defiantly):
"I am not yours to control!"

With a fierce cry, Kei channels all of her energy into a powerful spell. Light explodes from her, tearing through the Echo's shadowy form. The creature screeches in pain, its body disintegrating into nothingness.

Teri (grinning):
"That's the Kei I know."