I Am The Anti-Mage

Kim Ji-woo was back to Modern Earth after lived in the fantasy world for 30 years. But only to saw everything changed. Where Hunters with various magical powers fought against creatures that came out from the Portal Gate However, a powerful soul made him different from other hunters, set him on a course for an incredible and often precarious journey. Follow Kim Ji-woo as he embarked on an adventure to become an unparalleled existence through his curse into a blessing - the one and only in the dungeons world! — Description from novelcodex.org