Transmigrated as a Good-for-Nothing Prince, I Summon Three Thousand Gods and Demons to Sweep the Heavens

He transmigrates into the body of a good-for-nothing prince whose clan has been wiped out. The moment he opens his eyes, rebels have a blade at his neck, ready to behead him! Then he activates the God and Demon Summoning System. Kill one person, gain one level. With gods and demons at my command, the world is mine! God Guan Yu, Demon Li Kui, Immortal Zhao Feiyan, God Xiang Yu, Demon Zhang Fei, Immortal Zhuge Liang, God Yue Fei, Immortal Li Bai, Demon Li Yuanba, Immortal Hua Mulan, Demon Bai Qi... The Ice Emperor usurps the throne? Kill him! An enemy nation invades? Crush it! The System gives me a month to ascend the throne? No problem! I will conquer the land with an iron fist and impose order through slaughter. Summoning gods and demons from across the myriad heavens, I swear to become the most savage emperor in history, rule countless worlds, and rise above the nine heavens!