As the universe in Lin Feng's body expanded, Lin Feng felt that the cosmic power also increased exponentially. With the enhancement of the universe, the Laws of the universe would naturally become stronger.
Hence, as the universe expanded, Lin Feng mobilized the power of the universe and easily suppressed tens of thousands of Griffins. As these Griffins were not lifeforms born in Lin Feng's internal universe, they were incompatible with the universe. Even as their strength slowly increased, they would consume the power of the universe, and would not nourish the universe at all.
They caused only harm to the universe and no benefits. Hence, this was also why Lin Feng had not transferred lifeforms from the outside world into the universe back then.