Halfling's Revenge

Ko lived a happy life with his small little family in his small little goblin village. His father was the village's strongest warrior a level 30 mid-boss goblin champion, and his mother who was an ex-noble woodland elf.

With an elf's great life span and a goblin's natural raw power he was expected to be a great warrior for years to come. But when the fresh otherworldly hero from Earth comes to Ko's little goblin village to slaughter all the people and "save" Ko's mother.

With the pain of losing all he ever loved he swore to train to kill the evil hero.

This is a novel that mostly takes place in the opposite role of most other fantasy novels.