Who Said That People with Wood Attributes Can Only Be Used as Nannies?

The Human Interstellar Alliance is one of a kind among all the races in the universe. It relies on awakening powers to compete with powerful fleets and all races. The protagonist accidentally absorbed the original energy of the wood element of the universe and awakened the body of the Wood Emperor. Although the wood element can only be used as a wet nurse and conduct research. The protagonist relies on his true strength to fly across the universe.