Shakugan no Shana Vol 5 pg 153

“Simultaneously with the outward movements, you must feel the change in the Power of
Existence within—that is, the presence of an Unrestricted Method manifesting.”
This was a lesson that would be meaningless unless the teacher and student were a
Denizen of the Crimson World and a Flame Haze, a lesson that could only be given now.
“Yes, like this.”
Merihim spoke lightly, and the girl felt two concentrations of power within him this time. She
dodged a yellow beam of light fired without any preceding motion, and blocked another
orange one that came with a time lag with her ōdachi.