Spider (蛛) is printed on the technique catalog as Magatsumi kit: cobweb and eyes. Caught entities cannot move. This is not a fandom label. The three-count does not apply to this sword. Dragonfly, Centipede, Butterfly, Bee, and Malediction sit beside it.
Blade: Magatsumi. Group: insect kit. Catalog: techniques. Official: VIZ or MANGA Plus.