Weird: Staying in the Graveyard at Night, Starting the Contract with Yin Tianzi

[No system + no brainlessness + plot flow + weird invasion] That wisp of yin energy invaded the earth, and yin and yang were reversed. Gods and demons are rampant, and demons are wreaking havoc. Under the throne made of blood and bone, are the corpses of billions of creatures! The Emperor Zhenyin entered the body and took control of the troubled times. Xiang Yang: "I have a breath of abyss energy that can swallow up millions of Yin Cao soldiers!"