An Buchen entered Tank Court, using the energy contained within to draw several talismans, primarily invisibility charms.
She herself didn't know exactly what the drawing process was like, only that she effortlessly produced the talismans with practiced motions, and they were in a two-dimensional state.
An invisibility charm is practically useless in three-dimensional space, as it only allows for an optical camouflage-like transparency, and careful observation would reveal its outline.
In the Two-Dimensional World of Flat Kingdom, however, the efficacy of the invisibility charm was greatly enhanced, for the contours of the graphics were originally "line segments."
Two-dimensional vision is greatly limited, with visions of other graphics resembling line segments, while the invisibility charm could further restrict the visibility of the graphics, now even the line segment labeled "Yu Liang" was invisible.
