It was only known that among some of the human souls, golden light suddenly shimmered, and then without any need for the humans to act, a whole group of demon souls ended up being decimated.
Back in the mortal world, they were bullied by humans.
Unexpectedly, after dying and coming to Hell, they were still bullied by humans.
It was just too unreasonable.
"That is the power of incense fire."
"If, after death, you have descendants in the mortal world who perform rituals for you, then you'll gain an endless supply of incense fire."
"This incense fire is tremendously beneficial for us souls in Hell."
"Firstly, it makes one invulnerable to all evils, meaning if one is shrouded in incense fire, one becomes an immortal body, and no matter how many souls attack, they are all futile, rendering one invincible."