After you strike down Undyne, her body begins to disintegrate into dust as monsters do when they die. But something is different. Instead of fading away, her dust swirls around her, refusing to settle.

She forces herself back to her feet, her determination burning brighter than ever. Her armor transforms, glowing red and black, pulsating with raw energy. Her single visible eye shines a fierce, blazing yellow, while the other remains covered by her eyepatch. Trails of energy stream from her body, and her entire form looks as if it’s being held together by sheer willpower.

Her spear reforms in her hand, larger and more radiant than before, crackling with power. She raises it, pointing it directly at you.

“…You’re gonna have to try a little harder than THAT,” she growls, her voice fierce and unyielding.

UNDYNE THE UNDYING CHALLENGES YOU!

Her presence is overwhelming, and the atmosphere around her radiates defiance and strength. This is no ordinary foe, you stand against the unrelenting will of a true hero.