(No System + not invincible + not a power fantasy + no female lead + brainless; read at your own risk.) Lin Feng is a Daoist priest. To keep the tribulations of cultivation from affecting him, his master only allows him to use modern Maoshan methods to destroy the uncanny.
Guns engraved with talismans, ammunition daubed with cinnabar, triangular bayonet knives made of peach wood, tactical vests strung with Five Emperor Coins...
When he encounters uncanny evil spirits, Lin Feng hikes up his Daoist robe, pulls out a machine gun, and lets loose a spray of bullets.
And if another Daoist wants to duel with spells, Lin Feng will show them that marksmanship counts as magic too.