Yin-Yang Millstone

After a long time, at least, Han Fei felt that after a long time, Little Black and Little White finally became Venerables. Logically speaking, the growth of a Companion Spirit was usually no slower than its master. However, Han Fei's growth was too fast, causing the growth of his Companion Spirit and contractual spiritual beasts to seem to be extremely slow.

The only thing that amazed Han Fei was the Emperor Sparrow. With his speed, he would probably become a Venerable in a few years.

Of course, Han Fei had decided to stay in the Yin-Yang World for decades, so he wasn't in a hurry. He had Forge the Universe and time acceleration. If he gave Little Black and Little White ten years, it would be equivalent to more than three hundred years. Why would he worry that they couldn't improve their strength?

"Dad ~"