As a hero

100 years ago, Earth collided with a different planet with a huge source of power. The Earth people knew change and became a new home for monsters. As this happens, magical particles rain down to earth being absorbed by people of the earth gaining different powers and abilities. Warriors that excels in melee attacks, Mages that uses different magic elements to damage enemies, Marksman that uses bows and guns in long range, and Priest that uses supportive magic to help their allies.