Some unknown evolutionary disaster brought this creature about. Reaching heights up to 500+ ft tall and weighing over 600,000 tons, it is so massive and dense, that it has been deemed, quote, 'unstable' by modern science. It is a mystery how it survives and grows, since the only food it eats until maturity are microorganisms, but it does so anyway. By the time it reaches adulthood, its body is quite clearly, 60% mouth. It attacks, kills, and eats once in its lifetime, just overtopping its weight to the point of collapse. When it falls, the crash is so immense that seismographs have reported tremors nearby and the creature instantly perished upon impact. Strangely enough, it reproduces from its parts almost like a mother-of-millions plant would on our home planet.