I'm in the Demon Slaying Division. I'll Be Invincible After a Hundred Years of Slaying Demons.

Li Dao traveled to an ancient world where demons were rampant and ghosts were everywhere. He accidentally joined the Demon Slayer Division and became a demon slayer official. Because he accidentally obtained a technique to resolve evil spirits, he managed to survive in the Demon Slayer Division for a hundred years. Just when he was about to die from exhaustion, the system was finally activated. "Behead the ancient demon dragon, reward: 100,000 cultivation level, the essence and blood of the demon dragon." "Kill the Immortal Sect Master, reward: one million cultivation levels, immortal relics." "Kill the demon clan and demon god, reward: one million cultivation level, demon god egg." "Behead the fatuous emperor, reward: a female emperor?" Li Dao:...... At this point, there is no ordinary demon-slaying official in the world, and there is an executioner who holds the demon-slaying knife in his hand and cuts wherever he goes. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.