Blade Bug

Blade Bug is a special insect found both within YGGDRASIL.

Appearance
A giant mantis creature. It’s a long insect shaped like a broadsword.

Abilities
The Blade Bug can be used as a melee weapon when it attaches itself to the back of the user’s hand.

Trivia

 * The Light Novel never indicated that the Blade Bug was an aerial insect, but in the Anime it is.