Metamorphic Immortal Hunter

A young boy set on a journey to become the strongest with his passive immortality and using metamorphosis ability to become different entities with different powers. To his enemies he is known as devil's incarnation and to his beloved one's he is the angel. In a world filled with monsters will he become the strongest? Only his fate will decide what he will become. But will he let fate take it's action or he will decide his fate himself through his own efforts?