The key to pushing past the boundary for her sixth sense was special awareness. Like her sword domain which allows her to have a key understanding of her surroundings when using her sword, grasping the feeling of pushing past the boundary was special awareness of this 'dimension'.
Similar to what happens when a person enters her sword domain, the same need to happen with her sixth sense.
Normally, people 'drag' their intent to the real world such as materialising their killing intent in the form of an aura or such. To push past the boundary, she needed to do the reverse of this all.
"Wrong." The spirit said while attacking Shiro with a few light jabs.
Backing off slightly, Shiro gritted her teeth and tried her best to parry his attacks once more.
