He is an AU destroyer that has already managed to kill his whole Multiverse eradicating everyone and everything that has once existed in it. Unlike his original counterpart's Canon DustTale Sans, he is someone that is known for his power, as he is a being manifested by the pure HATRED he had once in his skeleton body. Full info: https://undertale-au-ideas.fandom.com/wiki/DustDust_(FlameLord)