Resets have happened, and UltSans reached to surpass Hatred, but not to defeat it.
As he rested after a reset, he observed a city while being in the top of a building, sitting at the edge careless, and enjoying the view and the pace of the moment.
But as the time passed, days, weeks, and even months, he saw it clear... Even if it hurted him, it was the humans' fault.
He tried to feel the same way, but... He took a deep breath, and got all out of his head, allowing him to truly feel the emptyness, and see all those feelings and emotions were driven by his own mind. And so... He started his genocide.
He easily used his magic to kill, destroying everything on his way, but yet... He wasn't invincible...
And the first to fall... Was his sanity...
Each kill, was a stab he was doing to himself.
It didn't last long, not even a day, before he encountered forces against him. But no force was ready for the maniac they would encounter.
Genocide itself was now starting to be saw as meaningless, as something bigger was being set.
UltSans, driven by his emptyness, and what he learnt, and what he has become, did proceed his way through, but also... Taking Hatred more than should... He got it from himself, and feed himself from it, as Hatred used to feed itself from him, and so... His determination changed into Hatred Determiantion, a force infused with will of bloodthirst and all types of maniac set ups.
He decided to pay what was left of a supposed "humanity" in himself, for careless improve himself as "how he should be".