“Generate umbra element.”

Upon chanting so while imaging a black matte gem, a miniscule
sphere of jet-black encircling a bluish-purple phosphorescence
appeared at the end of my rigid finger. It was one of the eight
«elements» existing in this world, the «umbra element». The degree
of difficulty for this art was a little higher, but those boring sacred
arts lectures and tests finally served their purpose after coming this
far.

The umbra element was the opposite of the «luminous element»
Dormitory Supervisor Azurika created to treat Eugeo's right eye
yesterday morning, tinged with a negative attribute. It was a
dangerous item that would scrape off the entire surrounding space
in one go if discharged as it was, but by utilizing its suction
property, it could be used in this manner as well.

“Adhere possession. Object ID, WLSS102382. Discharge.”

Finishing the chant for the art, the umbra element that floated at my
fingertip started to move as though it was sucked in by something.
It soared up towards the east as it swayed about, using up all of its
energy and vanishing right before it made contact with the
cathedral's wall. However, a faint bluish-purple trace remained in
the air for a duration of several seconds.

I quickly shifted my sight and stared intensely at where the line
drawn by the umbra element led to. Having done the same, Eugeo
spoke with slight disappointment.

“Looks like the swords really are inside the cathedral. I was hoping
they were stored away somewhere like an outdoor storage shed,
though...”

(Alicization Turning, 259)