Dustdust is a version of Dusttale where sans didnt confront the human in the final corridor, and instead absorbed the patience soul in order to continue his killing spree on the surface.

The intense amount of LV in his body has caused him to behave more aggressively, and the only thing keeping him from giving into unstoppable rage is the patience soul, desperately trying to protect the people around him for as long as possible while also involuntarily giving him more power.