The Kusa is a sacred knife used in Sudanese scarification rituals.
In order to trap the hunger demon Mnemoth, a Sudanese shaman used a Kusa to scarify a man. Some while later, John Constantine and Gary Lester broke in to the Fernbank Museum of Natural History in order to steal a Kusa on display. The former used it on the latter in order to re-trap Mnemoth.
- It should be noted that Kusa used by Samir and the one stolen and used by John Constantine were quite different in design.