My Childhood Sweetheart Traveled Through Time and Became a Saint from Another World

My childhood sweetheart was killed by an evil spirit. But she didn't die, Instead, she became a saint from another world. The world has become full of ghosts, and terrorist incidents are increasing day by day. She sent me otherworldly skills, Nightmare ghost? Kill! Hanged ghost? Kill! Kowtow ghost? Kill! Knocker? Kill! Kill all the evil spirits in the world! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.