Fantasy: with a Spear in Hand, the Trash Is the Spear King!

I am the spear king of a generation. With a spear in my hand, I can defeat invincible opponents in the world. I sweep across the three realms and kill hundreds of kings. Whoever stands in my way will be killed! Only by killing and frightening can one look down upon the heroes and become invincible in the world. He accidentally entered a mysterious cave, obtained the peerless magical skills of the ancient god emperor, and practiced the magical skills! From then on, he went on a killing spree, the sky was dark and the earth was dark! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.