Rikka Takanashi's Weapon (Chuunibyou)

This is a tripled headed scythe, created by the spider witch Arachne Gorgon. The back of the weapon resembles a witches hat while the blades resembles the fangs of a spider. The strange disk in the middle is actually a combustion mechanism, it enables the user to switch from scythe to shield. However, the witch died before bestowing it a name, some people refer to it as the fangs of the Gorgon.