C98 Infantile transformation?

Dugu Hong felt as if he had reached the limit, and his body was extremely tired. He really wanted to rest now. But, looking at how far he was still a quarter away, Dugu Hong forced himself to endure the endless exhaustion. He circulated the Red Sun Spell more quickly so that his body could absorb more of the world's spirit energy.

Sure enough, his hard work paid off. Very quickly