User blog comment:TheMightyWolfrik/Dragon eye/@comment-28891334-20150427124956/@comment-28891334-20150427184738

Humans do not have the technology as of yet to scan a animal and tell you all the details about it, so no at that time, it would be absolutely impossible to make with some use of magical/mystical powers. Inferno and toothless's tail are easily explainable. For Inferno, it is a spring powered telescoping sword, when retracted, the sword rests in a basin filled with with Monstrous Nightmare saliva / napalm, and is held down by a spring powered switch. When that blade is released, it would slide against a piece of flint igniting the gel. The gas weapon most likely functions through the use of pressurized Zippleback gas, sealed by bees wax, then when needed, the seal is broken and the gas is released and sparked by a flint lighter. Toothless's tail functions through the use of a simple pulley-gear system, adjusting the tail's spread and the tail's angle.