Fimbria's Sickle is a weapon used by Fimbria, a mercenary from Ashur's Group. Fimbria uses the weapon in Chosen Path in the assault on Seppius' Villa. After his death at the hands of Spartacus, it is unknown what happened to it though its possible it ended up the possession of the rebels.
The sickle is made from metal. It looks like a dagger-sickle combination and it is used with deadly skill.