OnePiece-Strongest ice Dragon

Born into the world of pirates with the power of an Ice Dragon Slayer, Loya quickly discovers that this sea is far crueler than the anime ever showed. Guided by Marine legends like Zephyr and Aokiji, he rises through the Navy’s brutal elite training while crushing every so-called genius in his path. But as his dragon power grows stronger, so does the mystery behind it. In a world ruled by Devil Fruits, Haki, and monsters of the sea, an entirely different kind of dragon has begun to awaken. — Description from novelcodex.org