The Venerable Xiang Yu, an eccentric villainous half-blood demon King was infamous in both the demon and human realm for being a cold-blooded ruthless devil that could kill with no remorse. Demons and humans feared him, cultivators wanted him as a trophy and the immortals saw him as a thorn in their side. The only reason he didn't get smote by the Heavenly King's searing lightning of divine wrath that could kill all mortals and immortals was because he kept the deadliest demons in check maintaining peace between the two realms. Despite his reputation, he had a small cult following in the human realm. They took him as their deity for his selfless acts of benevolence. Such rare selfless acts led him to rescue the fallen immortal Han Xin. But his benevolence became his downfall. Condemned to death, he faced an impossible choice: serve the Heavenly King or die with no marked grave. Xiang Yu: Hahaha... death isn't so bad after all. Heavenly King: You... Han Xin: Wife, you can't escape even in death. At least when you are alive you have a chance to run. Xiang Yu: QAQ...
Totally recommend this story. The author is going for a light novel vibe, with the epic fight of Hero vs. Demon King, with complications. In this setting, the Demon King is in the final stages of winning. The MC hero is just one of many sent over to stop him, but the others usually give up. Anyone who likes isekai stories should read this. This is better written than most of the other isekai stories out there.