Legendary youkai diary

the legendary king of ancient Mesopotamia, Gilgamesh become bored of the state of the world and wanted to spice up the situation and he finds the soul that can handle his power and he found it but it was a child youkai that almost lose his life but he gives that power and recover his soul and he said "entertain me mongrel for you have the power of the greatest human king in the world" so begin the journey of youkai child that being passed down to his diary my first time write this novel i hope that you can enjoy please comment when there are grammatical error thanks!!!!!!!