Through a unique Cede ignition, the golden bullet shot out from the muzzle of the gun. The Cede runes engraved on the bullet rapidly absorbed the surrounding natural energies and struck the black smoke snakes.
Cede could be considered to be an omnipotent ability. As long as it was something that this world recognized, Cede would be able to accomplish it, and the only exceptions were matters that surpassed the world's capabilities.
Other than the beast tooth that actually originated from outside this world, the essence of the serpent was a mass of Source Energy that was absorbed from outer space. After undergoing the world's modifications, the black smoke venom that it created would naturally also be a product of this world.
And since it was a product of this world, the world surely had a way to counteract it.