Western Fantasy: Picked up an Elf That No One Wanted

[Western fantasy + non-travel + non-transformation, no sword, semi-invincible] In the depths of an unknown forest, the sleeping dragon quietly awakened, and the chosen creature was born again. However, Kaden, who witnessed everything, never realized that he would be carried forward by the changes. Kaden: Why do I feel like someone is staring at me? (The first volume is a bit boring, you can jump directly to the main plot of the second volume)