Is it difficult to evolve a beast?

Jiang Feng was very confused. Why was he, an ordinary person, forced to go to the battlefield to fight against ferocious beasts? After being reborn, she discovered that it was not that she was unable to awaken her talent as a beast master, but that there was a traitor around her! There seems to be another hidden reason behind the death of parents? She is not an ordinary person who cannot become a beast master! In her past life and this life, she must figure out who is behind it! She wants to get all the inheritance left by her parents! Those who are causing trouble behind the scenes will never be let go. Also, there was the Gray Cloud Wolf who had been with her for many years in her previous life, from being vigorous and strong to becoming old and decrepit. Jiang Feng turned around: "Uncle Wolf, let's go, I'll take you to catch your favorite mouse!" Gray Cloud Wolf: "Ouch~"...