The journey from the Sinkhole to the Chaos Heavens was long. Although the Celestial Silkworm's blood was potent, even it was bound to deplete with the prolonged use of energy. Yi Yun had already been traveling for three years in the void, and his condition had gotten much worse.
As for the Nine Transformations Celestial Silkworm itself, without being supplemented with Yuan Qi or natural treasures, it had fallen back asleep after spitting out the blob of blood essence.
Yi Yun could sense that the Nine Transformations Celestial Silkworm's vitality was gradually weakening. It worried him greatly. He would inquire Bai Yueyin about the distance left to the Chaos Heavens periodically, but she was unable to confirm their location exactly.
Too much time had passed. The universe was in constant flux and the changes billions of years brought about already made it quite an impressive feat that Bai Yueyin was able to get the general direction.