For thousands of years, the light world and the dark world have maintained a peaceful appearance of non-interference with each other - this can only be established on the premise that both sides have equal strength. As the Lord of the Dark World becomes increasingly powerful, and no new Lord is born after the last Lord of the Light World ascended to godhood, the Dark World's covetousness towards the Light World gradually comes to light, while the Light World is in disarray...
Intention: rush duck