Legend Of Phoenix

A brief description of the Legend Of Phoenix manga:

By chance, an unremarkable 10-year-old boy with a comet flies into the land of dreams. There he lives with the dwarves who inhabit the planet, he hones his talent, gets stronger and acquires skills. Not only is he incomparably good at blacksmithing dwarves, but he also invents a new kind of martial art. However, as soon as he gets used to it and seems to heal quietly, he begins to have envy…