Yes this is the weapon mentioned in the canon story of when eggyhead stole the amulet
It has a couple cool abilities
First of all it is compatible with her unholy magic meaning it can light itself on fire for more damage
The end is able to shift to make other weapons, such as a trident, a spear, and even a claw, however a scythe is it's main form
And lastly it can fold down and be clipped on her waistband, but it can still just be put on her back to look cool however the first option would be more convenient