The sphere floated before her palm, spinning slowly.
"Watch carefully."
Ouroboros released the sphere directly toward herself.
The projectile shot forward at tremendous speed, aimed directly at her chest.
Then it stopped.
The sphere hung suspended in midair, mere inches from Ouroboros' body. It continued spinning, continued exerting forward momentum, but made no progress whatsoever.
"The attack is still moving," Ouroboros explained calmly. "It travels forward continuously, covering distance with each passing moment."
She smiled faintly.
"But the distance between us has become infinite. No matter how far it travels, the attack will never reach me because there is always more distance remaining."
The sphere dissolved harmlessly after a few seconds.
"This is the Infinity Barrier, the most basic yet most important defensive application of our power."
Grey's analytical mind immediately began processing the concept.
