The Dragon Who Devoured the World: Beginning with Rebirth as a Black Dragon.

The soul from Blue Star crossed over and became a little black dragon that had just broken out of its shell. In this dangerous world, he could only rely on his own talent to grow.
"This world looks so big, and it's colorful, and it should taste good!" said a black dragon that was the size of countless worlds, looking at the plane in front of him.