The black scimitar is a low level weapon. Unlike the other scimitars (with the exception of the Dragon scimitar), it cannot be smithed. Black scimitars can only be obtained from PvM, Zeke and PvP. Scimitars are notable for their strength and speed and are ideal for training from low level to high. Black scimitars require 10 Attack to wield and are slightly more powerful than steel scimitars, therefore they are the better choice.
Black scimitars can be purchased from Zeke, who is located in Varrock.