Demon's essence

Fade was on top of Reo's now gigantic head and took out his customized handgun which he had created with the help of Michael who had the Spirit of the Akashic Records, and a few experts hired by Harold. 

This handgun was one of a kind as the materials used on it were various rare metals found in the forbidden zone. It was quite heavy weighing around twenty kilograms, and the barrel of the gun was longer than most which was eight inches long. The handgun was created to be able to withstand a powerful burst without breaking this gun can even withstand artillery bombardment, not only that but the overall design made it look like a knife with a gun barrel, this was on purpose so Fade could also use it as a melee weapon for slashing and stabbing.