DragonSpell: Tournament of Champions

Akira is a boy from an extinct species has his planet destroyed at a young age, he gets mysteriously transported to Earth but knows nothing about his past and species, so he thinks he is a human. He gets taken in by an old man and learns the way of the humans. Despite everyone at the beginning making fun of his unique appearances they find out he is funny and sweet and become friends with him. Years pass and he adapts to human life on Earth, once he reaches the age of 19 the alien warlord who destroyed his planet comes back and kidnaps him, forcing Akira to fight in an intergalactic tournament so he can win the warlord the title of Galactic Lord. Will Akira find out about his lost past? Or will he die in the tournament? (The cover of the book is a character later in the book that I drew)